Across
Old man put something intoxicating in magnificent joint (6)
I haven't cracked this one yet — but Fifteensquared have:
PA (old man) + LACE (put something intoxicating in, eg a drink)
Elaborate on principle of vegetarianism? (5,3)
I haven't cracked this one yet — but Fifteensquared have:
Double definition
Spaces between latrines changed to accommodate volume (9)
I haven't cracked this one yet — but Fifteensquared have:
Anag (changed) of LATRINES and V. [As FrankieG rightly points out, strictly speaking the anagrind only applies to LATRINES, which is around (accommodates) V]
Take fleece off husband wearing brand (5)
I haven't cracked this one yet — but Fifteensquared have:
Insertion (wearing) of H into SEAR
Intentionally false leads detective inspectors lined up? (14)
I haven't cracked this one yet — but Fifteensquared have:
Charade of DIS + In FORMATION
Too nice to dismiss minister, on reflection, during October (9)
I haven't cracked this one yet — but Fifteensquared have:
Reversal (on reflection) of AXE REV inside (during) OCT
On break, flipping thing calling you back to work (5)
I haven't cracked this one yet — but Fifteensquared have:
Reversal (flipping) of RE (on, concerning) + GAP
Biologist's type of knee (5)
I haven't cracked this one yet — but Fifteensquared have:
Genu is the Latin/medical term for a knee, so GENU’S could signify “of knee”
Outlaw maybe does bother to carry unloaded pistols around (9)
I haven't cracked this one yet — but Fifteensquared have:
DEER (those kinds of does) +ADO (bother) around a reversal (around) of the outer letters of PistolS (unloaded)
Jargony long article IMO needs editing (14)
Big date, record ejaculation from Scot (5)
I haven't cracked this one yet — but Fifteensquared have:
EP (record) + OCH (ejaculation from Scot)
Dirt spread by insect on doughnut (9)
I haven't cracked this one yet — but Fifteensquared have:
Anag (spread) of BY INSECT and O. It’s an interesting truth that all doughnuts in crosswordland are O-shaped. Never any jam in them. [Again, as pointed out by FrankieG, the anagrind applies only to BY INSECT, which is then put “on” the O/doughnut, which has to come first in the solution]
Helicopter Republican agreed is turning blue (8)
I haven't cracked this one yet — but Fifteensquared have:
Reversal (turning) of R + OK + IS followed by SKY, for the US helicopter manufacturer
Coming soon from Jonathan Demme ... (2,4)
Down
Feeling under pressure to get ducks in a row (4)
I haven't cracked this one yet — but Fifteensquared have:
P followed by (under, in a down clue) AIR. The definition refers to a cricketer who is out for a duck in both innings of a match, who is said to have got a pair
A bit of Latin, Greek and English in grid (7)
Being round climbers with fruit, dog on sierra gets to eat (9)
I haven't cracked this one yet — but Fifteensquared have:
Insertion (gets to eat) of VINES (climbers with fruit) into CUR + S
Comfort on the way out, girl boxes stock (4,5)
I haven't cracked this one yet — but Fifteensquared have:
Insertion (boxes) of TRITE (cliched, as in a stock character) into LASS
Alexander, band leader in alley? (5)
Opportunity to write home during journey back (7)
I haven't cracked this one yet — but Fifteensquared have:
PEN + IN inside a reversal (back) of GO
Cast heard Othello upset audience there for Lear? (6,4)
I haven't cracked this one yet — but Fifteensquared have:
Homophone of “thrown” (cast) + reversal (upset) of MOOR
Very thin person beginning to ask whether to put weight on (4)
I haven't cracked this one yet — but Fifteensquared have:
A (beginning to ask) + IF (whether) under W
Really worry about case of neighing chanteuse (10)
I haven't cracked this one yet — but Fifteensquared have:
SO + STRESS around (about) outer letters (case of) NeighinG
Unreadable novel? (9)
I haven't cracked this one yet — but Fifteensquared have:
Cryptic definition. Which, by definition, is inaccurate as audiobooks are indeed read by the reader. But OK, we’ll stretch a point and say that the listener can’t read an audiobook
Macron's ready with team name in his office (9)
I haven't cracked this one yet — but Fifteensquared have:
PRET (French for ready, so “Macron’s ready”) around SIDE + N
Broad area of new floor sunken in the middle (7)
I haven't cracked this one yet — but Fifteensquared have:
Anag (new) of FLOOR and the central letters (in the middle) of suNKen to give the UK county that is home to the Broads
Painter and writer introduced to people who try not to drink coffee (7)
I haven't cracked this one yet — but Fifteensquared have:
Insertion (introduced to) of RA + BIC (French brand of disposable ballpoint pens) into AA (Alcoholics Anonymous, not the motorist’s roadside assistance organisation)
Which organ is filled with Zeus's blood? (5)
Get rid of square unfashionable clothes (4)
I haven't cracked this one yet — but Fifteensquared have:
Insertion (clothes) of S into OUT
You might say faded, not really blonde? (4)
I haven't cracked this one yet — but Fifteensquared have:
Homophone (You might say) of “died”
Type letters or click words in the clue