in effect - in fact, so far as the result is concerned

singsing - a singing or ringing sound + Song of Solomon + zinzin (motif).

Pound, Ezra (1885-1972) - American poet, liked cats + arse + (as sweet as the song Solomon or as brusque as Ezra Pound) + Asar, Asari, Aser, Ausar, Ausir, Wesir, Usir, Usire or Ausare - Egyptian name, variously transliterated, of Egyptian god who, in Greek language, was called Osiris.

Kate (*K*) + Cad = The Dorans (Joyce's list of characters in I.2.)

mêtêr (gr) - mother + who's she---the cat's mother? - catch-phr. said to one (esp. a child) who uses the pronoun of the third person singular impolitely or with inadequate reference + HCE (cad's meeter).

Cad's Wife = Maggy (Joyce's list of characters in I.2.) + "Our cad's bit of strife (knee Bareniece Maxwelton)".

better half (Slang) - spouse → so, "half better" should be "the director, whom she had been meaning in her mind primarily to speak with... priest Mr Browne" + Sodality Priest = Shem *C* (Joyce's list of characters in I.2.).

Teacher = Lily Kinsella (Joyce's list of characters in I.2.) + "hushly pierce the rubiend aurellum of one Philly Thurnston, a layteacher of rural science and orthophonethics..."

"...during a priestly flutter for safe and sane bets at the hippic runfields of breezy Baldoyle" 

shooting up - sprouting, sudden or rapid growth + show up - to put in an appearance.

Bolshevism - the doctrines and practices of the Bolsheviks + How Buckley shot the Russian General (motif).

Schott - according to Mr Ellmann, Joyce's "no 1 pupil" in Trieste. "What's he like?" "A horseface," Joyce said. In FW, Schott becomes Joyce, lectured to by Professor Jones or Wyndham Lewis + Schotten (ger) - Scots + Baum (ger) - tree.

Red Terror - the persecution of opponents by the Bolsheviks after the Russian revolution

White Terror - applied to the counter-revolution that followed the Red Terror

fund - source of supply; a permanent stock that can be drawn upon; a stock or sum of money

in fine - to conclude or sum up; finally, in short

Spartacus - leader of Roman slave revolt, a hero in Communist hagiography; name used by German revolutionaries, 1918.

intercellular - situated between or among cells + {the letter is an ancient message from a cell of slave rebels}

cornered - driven into a corner; forced into an awkward or desperate position + Thou Art Not Conquered Yet, Dear Land (song).

dead hand - the influence of the dead on the living or of the past on the present; an oppressive and retarding influence

froggy - rel. to or resembling frogs; French

dew + 'The Foggy Dew' - song about Easter Rising.

The Dying Soldier (song): 'Sweeter far for thee to die'

We Shall Rise Again (song): 'In Dublin's fair city'

'Twas on a Glorious Easter Day (song): ''Ere one more year is o'er'

tourn = turn + turn coat - to change sides.

We Shall Rise Again (song): 'From Swords to the sea'

merge - to plunge or dip in a liquid; to sink and disappear, to be swallowed up and lost to view, lose character or identity by absorption into something else

My Old Howth Gun (song)

Bishop O'Dwyer and Maxwell (song): 'Then answer made the brave O'Dwyer'

est modest in verbos (l) - there is limit in words

whoso - whoever

fornix - something resembling an arch + fornix (l) - arch, vaulted chamber + Phoenix Park.

Magazine + makeus (Finnish) - sweetness + make us sin + By the Magazine Wall, zinzin, zinzin (motif).

curate - In Ireland, a spirit-grocer's assistant, a barman + Times Literary Supplement 18 Jun 1914: review of Joyce's Dubliners: 'The reader's difficulty will be enhanced if he is ignorant of Dublin customs; if he does not know, for instance, that 'a curate' is a man who brings strong waters' (Deming: The Critical Heritage 60).

strong water - distilled liquor, any form of alcoholic spirits used as a beverage

dinna - do not + The Letter: don't forget + "What means the saloon slogan Summon In The Housesweep Dinah?"

there's many a slip between the cup and the lip - it is easy to spill what you are drinking, it is easy to make mistakes

The Letter: all at home's health

ausland (ger) - foreign countries

The Letter: the last of the first

Kate - a pet form of Katherine; prostitute (Slang) + wedding cakes + The Letter: lovely present/parcel of cakes.

The Letter: unto life's end

milkman + mike - Irishman + The Letter: the heat turned the mild.

tart - girl or woman (endearingly); a prostitute + sweetheart - darling.

punch - to deliver a sharp blow or forward thrust at; esp. to strike with the closed fist + {enough to make Mike punch the hell out of his twin Nick}

hate (Anglo-Irish Pronunciation) - heat + hell-hated - hated or abhorred as hell.

nicky - dim. of Nicholas + Mick/Nick (motif).

boost - a push upward, a lift, help, encouragement; boast

lingo - A contemptuous designation for: Foreign speech or language; language which is strange or unintelligible to the person who so designates it.

gasp - to catch the breath with open mouth

churchwarden - a lay honorary officer of a parish or district church + (vicars of the church).

metaphysician - one who is versed in metaphysics

in a row - one after another

advokette = advocate + advokaat (Dutch) - barrister + vocatives.

voyou (fr) - guttersnipe

semi-voyelles (fr) - semivowels

langue (fr) - language; tongue

labials

dentelle (fr) - lace + dentals.

gutturals

Furz (ger) - break wind, fart

pythagorean - rel. to Pythagoras

sesquipedalian - a sesquipedalian (of many syllables) word + sesquipedalia - a very long word (a foot and a half long). 

pan- - all, complete + episteme (gr) - knowledge + panepistemon (gr) - all-knowing + panepistemion (gr) - body of all knowldege.

apically - at or towards the apex + apices (l) = pl. of apex - long mark over a vowel; point of a single letter; shape of a letter + epically.

Volapuk - an artifical international language based largely on English

gromwell - the common name for any of the plants of the genus Lithospermum + grom (Russian, Serbian) - thunder + growled + Cromwell.

ichabod - exp. of regret for departed glory + Ichabod ("inglorious") - so named (1 Samuel, 4) because "The glory has departed from Israel." 

Habakkuk - Old Testament book

hapax legomenon (gr) - [a thing] once said, said only once; unique example of a word (O Hehir, Brendan; Dillon, John M. / A classical lexicon for Finnegans wake).

stile - an arrangement of steps, rungs, or the like, contrived to allow passage over or through a fence to one person at a time,while forming a barrier to the passage of sheep or cattle; barrier + (furtive couples).

slated - covered with slate or slates (a thin, usually rectangular, piece of certain varieties of stone, used especially for the purpose of covering the roofs of buildings)

dwelling house - a house occupied as a place of residence, as distinguished from a house of business, warehouse, office, etc.

sacking - material for sacks, a coarse fabric

coarse - ordinary, common, base (in the depreciatory sense of these epithets) + horsecart.

hath = have + (love was, is, and will be).

wear and tear - wearing or damage due to ordinary usage, deterioration in the condition of a thing through constant use or service + tare and ages! (Anglo-Irish phrase) - (mild expletive).