Across
After ignoring the first letter desolate people ultimately accept dispossession (9)
Clumsy fiancé regularly falls out with personal trainer (5)
Food company finally fixed trough (7)
Rude call-out is heard in part (7)
I haven't cracked this one yet — but Fifteensquared have:
LOUTISH ( hidden word in [in part] CAL L-OUT IS H EARD)
Banker's paintings discovered (4)
I haven't cracked this one yet — but Fifteensquared have:
M URAL S ([wall] paintings) excluding the outer letters (dis-covered) M and S
What Liberal Democrat must be to be seen as moral and creditable? (10)
I haven't cracked this one yet — but Fifteensquared have:
ANAGRAMMED (as described above)
Start without key or with broken key (7)
Brave military man shot arrow over ambassador (7)
Following intelligence top spy infiltrates gathering on the quiet (10)
I haven't cracked this one yet — but Fifteensquared have:
INFO (information; intelligence) + ( M [code name for the fictional head of MI6 as depicted in the James Bond novels and films; top spy] contained in [infiltgrates] RALLY [gathering])
Screech owl eating parrot (4)
Trouble going from Syria with initially unnoticed drug supply (7)
New Zealand natives see you carrying cross around (7)
I haven't cracked this one yet — but Fifteensquared have:
TA-RA (goodbye; farewell; see you) containing (carrying) TAU (T-shaped cross) reversed (around)
The place in which that woman punches partners (5)
I haven't cracked this one yet — but Fifteensquared have:
HER (that woman) contained in (punches) ( W [West] and E [East], partners in a game of bridge)
Handy gear for processing plant (9)
Down
Party hard routinely getting plastered drinking without getting upset (15)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of (getting plastered) HARD ROUTINELY containing (drinking) W/O (without) reversed (getting upset)
Star soldiers under Stalin? (8)
Display containing no end of goose fat (5)
I haven't cracked this one yet — but Fifteensquared have:
S E T OUT (display) excluding (containing no) E ( last letter of [end of] GOOS E )
Judgement posted before Vice President loses power (8)
Camp stand-up takes all laughter as good to begin with (6)
Artist supports innovative musical representations (9)
He represents this priest boring philosopher endlessly (6)
Mashed potato father had right away (15)
Two overlapping signs for lenders (9)
I haven't cracked this one yet — but Fifteensquared have:
LIBR A (one of the signs of the zodiac) + A RIES (another sign of the zodiac) with the two signs sharing (overlapping) the letter A
You and I are going to quarrel - that's rich (8)
Swap shillings and farthings? (8)
One who doesn't eat more quickly (6)
News agency at Hay scrapping article for lack of interest (6)
I haven't cracked this one yet — but Fifteensquared have:
AP (Associated Press, a news agency) + AT + H A Y excluding the A ([indefinite] article)
When half-cut fame and talent can be deadly (5)
Type letters or click words in the clue