Across
Leave talk, missing one truthful statement (6)
Nasty leader deposed, as should be the case (8)
Religious service affecting godliness? Not the first third of it (6)
Urine not analysed for tiny particle (8)
I find I am almost nuts, crazy for ever (2,9)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (crazy) of I FIND I AM NUT[s]
Figure in geometry, German expert brought over in care of academic (7)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (brought over) of G (German) ACE (expert) in DON (academic)
Succeed in taking out middle of red target and shout (7)
I haven't cracked this one yet — but Fifteensquared have:
EXC[e]L (succeed?) minus e (middle letter of red) + AIM (target)
Insulting the powerful? Not exactly seemly to include a joke (4,7)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (not exactly) of SEEMLY round A JEST (a joke)
Carbon and carbonised material? Support monetary incentive (8)
Slender volume bound in steel, unexpectedly (6)
Very fierce about women using bad language (8)
I haven't cracked this one yet — but Fifteensquared have:
SEARING (very fierce) round W (women)
English navigator recalled wonderful feature of fish (6)
Down
Fellows scored after upsetting drink (6)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (after upsetting) of F F (fellows) + ACED (scored)
Transmit over the internet stories about five players — that's about right (4-6)
I haven't cracked this one yet — but Fifteensquared have:
LIES (stories) round V (five) + TEAM (players) round R (right)
Rich fools about to accept dodgy myth on a regular basis (8)
Lots of flowers are found in Greek territories (8)
I haven't cracked this one yet — but Fifteensquared have:
A (are – a metric unit of land – 100 square metres) in GR (Greek) LANDS (territories)
Group taking a bit to produce special item (3,5)
Airmen soaring, circling Italy, having good weather (4)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (soaring, in a down clue) of RAF (Royal Air Force – airmen) round I (Italy)
Money running short when raised for factory machine (4)
New promotion about part of plane cut down in next to no time (10)
I haven't cracked this one yet — but Fifteensquared have:
N (new) AD (promotion) round NOSECON[e] (part of plane, cut down)
Fool in book almost split symbol with stave (4,4)
I haven't cracked this one yet — but Fifteensquared have:
ASS (fool) in B (book) CLEF[t] (almost split)
Call up about fire in the sky (8)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (up, in a down clue) of NAME (call) round PYRE (fire)
Blogger exercised about date and name of variations (8)
Cheerful judge I found in cricket venue (6)
I haven't cracked this one yet — but Fifteensquared have:
J (judge) + I in OVAL (cricket venue)
With a couple of swaps, group of performers performs (4)
I haven't cracked this one yet — but Fifteensquared have:
CAST (group of performers) with a couple of letters swapped
Small area of land is left reduced by 50% (4)
Type letters or click words in the clue