Across
Ill-treatment is stopping contemplation (6)
America abandons teaching evolution (8)
Run down director to transfer country mansion at last for millions (9)
I haven't cracked this one yet — but Fifteensquared have:
D (=director) + E<N for M>IGRATE> (=to transfer country; “mansion at last”, i.e. last letter of “mansio N (=N) for M (=millions)” means letter “m” is replaced by “n”)
Nonsense absolute nonsense about everything (5)
Think carefully: are carbon sinks complex? (14)
TV programme in short showing group of women in part of club (5)
List of people protecting Argentine Marxist in New York City (9)
Seven points written after one shows incompetence (9)
I haven't cracked this one yet — but Fifteensquared have:
I (=one) + N + E + PT + N + E + S + S (“seven points”, where six of them are points of the compass and the other one is the abbreviation “pt” for “point”)
Chap running opera (5)
I mismanage folk developing laxative (14)
Almost stop false statement extremely briefly (5)
Lecturer appeased after late start took action (9)
Antiparticle with no resistance outside current location (8)
Have confidence in force (6)
Down
Dicky married to cross woman who is in charge (10)
Prickly character really lovely mostly (5)
Italian man pays no attention to raising son (7)
I haven't cracked this one yet — but Fifteensquared have:
IGNORE S (=pays no attention to; “raising son (=S)” means letter “s” moves upwards in the word)
American fool's date number one with bishop (5)
Four Swedes in prison sharing a vegetable (7)
I haven't cracked this one yet — but Fifteensquared have:
ABBA (=four Swedes, i.e. the four singers/musicians that make up the group) in CAGE (=prison); there are two x “a” in “cabbage”, not three x “a”, so one x “a” has to be shared when “ABBA” is placed in “CAGE”
I pitch to north London district (9)
Reportedly is aware of aroma (4)
Unconcerned about official losing heart (8)
Spiky type intoned I am no right-winger from South Shields (10)
I haven't cracked this one yet — but Fifteensquared have:
An iron maiden is an instrument of torture, hence “spiky type”; I cannot sort out the wordplay, alas
Small trees on sierra showing quality of trees often found by river? (9)
Actors on show with yen to bury regular characters in durable TV series (8)
I haven't cracked this one yet — but Fifteensquared have:
<d> U <r> A <b> L <e> (“regular characters” means alternate letters only) in [CAST (=actors on show) + Y (=yen, as in Japanese currency)]
Destroy US restaurant (7)
I haven't cracked this one yet — but Fifteensquared have:
A takeout is the US equivalent of the British takeaway; to take someone out is to kill or destroy them, in slang
Short time on fashion magazine topless for pop icon (7)
Painting of revolutionary in book (5)
I haven't cracked this one yet — but Fifteensquared have:
OIL (=(type of) painting) + OF; “revolutionary” indicates reversal
Evil being took article (5)
Caught body part in fastener (4)
Type letters or click words in the clue