Across
Witness signature and stay low (8)
I haven't cracked this one yet — but Fifteensquared have:
NOT A RISE=do not rise=”stay low”
Rightwing extremist leaders are unable to back down (6)
19d
Adjustment of direction that may lead to source (8,6)
Perennial barking first thing in the morning and we don’t like it (6)
I haven't cracked this one yet — but Fifteensquared have:
first thing from B-[arking], plus AM=”in the morning” + BOO=”we don’t like it”
Tory leader in foul play as might be expected (5)
I haven't cracked this one yet — but Fifteensquared have:
leading letter from T-[ory], in anagram/”foul” of (play)*
Victim of mariner as Borstal delinquent (9)
Returning pointer running wild around chambers (12)
Novel crossbeam rigged by egg-producer (6,6)
I haven't cracked this one yet — but Fifteensquared have:
definition: a novel [wiki] by Flaubert “crossbeam” is split into cross//beam, leading to: MAD=”cross” + anagram/”rigged” of (beam)*, plus OVARY=”egg-producer”
Puzzler’s song about gold limo? (9)
I haven't cracked this one yet — but Fifteensquared have:
Araucaria [wiki] , or John Galbraith Graham, set cryptic crossword puzzles for the Guardian ARIA=”song”, around: AU (chemical symbol for “gold”) + CAR=”limo”
After saucy crosswords to begin with, the Guardian’s getting clean (5)
I haven't cracked this one yet — but Fifteensquared have:
definition: “clean” as a verb beginning letters of S-[aucy] C-[rosswords]; plus OUR=”the Guardian’s”
Bob possibly first to hear radio broadcast (6)
I haven't cracked this one yet — but Fifteensquared have:
definition: a ‘bob’ is a type of hairdo “first” letter of H-[ear], plus anagram/”broadcast” of (radio)*
Entertainment coverage for home sides taking a last dash (5,3)
I haven't cracked this one yet — but Fifteensquared have:
FUN=”Entertainment”, around/covering: IN=”home” plus LR (Left and Right, “sides”), taking in “a” from the surface
Ride through African territory (6)
Tennis player heard chasing bet to come first (8)
Down
Drink is handy when holding court (6)
Warm and comfortable where little piggy went? (6)
I haven't cracked this one yet — but Fifteensquared have:
a little piggy might have gone TO A STY
13 or 15 creative art – ‘e by gum! (5,4)
Here in California Arab tans easily and another heads north (5,7)
I haven't cracked this one yet — but Fifteensquared have:
anagram/”easily” of (Arab tans)*, with “another” instance of the word ARAB reversed upwards (heading north)
Praise would be accurate if penultimately doubled (5)
I haven't cracked this one yet — but Fifteensquared have:
EXA-L-T would become EXA-C-T=”accurate”, if the penultimate letter went from L to C, which in Roman numerals would be a doubling from 50 to 100
Divine food as originally barbecued with Maori cooking (8)
I haven't cracked this one yet — but Fifteensquared have:
anagram/”cooking” of (as b Maori)*, with the b from “originally b -[arbecued]”
You old smooth number (8)
Bombshell at heart interested in flying BA or SAS for example (12)
I haven't cracked this one yet — but Fifteensquared have:
BB (“bombshell” indicates the shell or outer letters of b-[om]-b), plus “heart” or central letters of [inte]-RE-[sted]; both going in AVIATION=”flying”
Tech industry quickly conceals mounting affliction (9)
I haven't cracked this one yet — but Fifteensquared have:
APACE=”quickly”, around/concealing SORE as a noun=”affliction” reversed upwards/”mounting”
Definitive hospital having slipped becoming compassionate (8)
I haven't cracked this one yet — but Fifteensquared have:
EMP-H-ATIC=”Definitive”, with H for “hospital” slipping to a later position among the letters
New edition about a thoughtful process (8)
See 9 Across
Managed to interrupt shock therapy, rising in a semiconscious state (6)
I haven't cracked this one yet — but Fifteensquared have:
RAN=”Managed”, interrupting inside: ECT (electro-convulsive therapy) reversed upwards/”rising”
Bum and dunderhead locked up? (5)
I haven't cracked this one yet — but Fifteensquared have:
definition: to scrounge, to beg D (dunder//head, the head letter of d-[under]), with “locked up” as an instruction to put it in CAGE
Type letters or click words in the clue