Across
At Arsenal United fan starts to dance so wildly it makes ground shake (15)
I haven't cracked this one yet — but Fifteensquared have:
*(AT ARSENAL + U (=United, as in Man U ) + FAN + D <ance> S <o> (“starts to” means first letters only)); “wildly” is anagram indicator; cryptically, one can say that, as a cause of earthquakes, the San Andreas Fault “makes (the) ground shake”!
Mock host screening film 'Big' regularly (5)
I haven't cracked this one yet — but Fifteensquared have:
<f> I <l> M <b> I <g> (“regularly” means alternate letters only are used) in MC (=host, i.e. Master of Ceremonies)
Odious businessman backed ban on the French (9)
Erotic film produces high-pitched sound - what caused it? (8)
Tennis shot entertains with change of direction ... (6)
... and following shot not in court (9)
Supporter on track about to get run over (5)
Very large wardrobe separates clothes (5)
Crack cocaine around ship - coming onboard (9)
Quite popular thing to do (6)
A Welsh woman reportedly avoided illness in pandemic (8)
I haven't cracked this one yet — but Fifteensquared have:
A + SIAN (=Welsh woman, i.e. a typical Welsh female forename) + homophone (“reportedly”) of “flew (=avoided, fled from)”; the deadly Asian flu pandemic swept across the world in 1957-8
Hand over old business it's stuffed (9)
I haven't cracked this one yet — but Fifteensquared have:
EX- (=old, former) + [IT in TRADE (=business)]
Mean ratbag finally knocking out cold unappetising meal (5)
I haven't cracked this one yet — but Fifteensquared have:
C RUEL (=mean, nasty); “ ratba g finally (=last letter, i.e. G) knocking out cold (=C)” means letter “g” replaces letter “c”
Posh area's reputation ruined with start of rock band (15)
I haven't cracked this one yet — but Fifteensquared have:
STOCK (=reputation, estimation, according to Chambers ) + BROKE (=ruined, destroyed) + R <ock> (“start of” means first letter only) + BELT (=band, stripe)
Down
Review first three parts of music? (5)
I haven't cracked this one yet — but Fifteensquared have:
Cryptically, the “first three parts (=letters) of mus ic ” are MUS, which corresponds to “SUM” up (=vertically reversed)!
Initially nervous individual seals off brownish leak (9)
I haven't cracked this one yet — but Fifteensquared have:
UMBER (=brownish) in [ N <ervous> (“initially” means first letter only) + ONE (=individual)]; to go for a number one is to go for a wee, take a leak !
Help oneself to son's chips (5)
Ignoring wife write choral works over-elaborate in style (10)
National Trust eschews God Save the King ? I doubt that! (4)
I haven't cracked this one yet — but Fifteensquared have:
A <nt> HEM (=God Save the King, i.e. the national anthem; “ National Trust (=NT) eschews” means letters “nt” are dropped)
Wire melts in separate small explosions (9)
Permit entry into godless Scottish town? (5)
I haven't cracked this one yet — but Fifteensquared have:
(d)UNBAR (=Scottish town; “ god -less” means that letter “d (=God, i.e. Deus)” is dropped
Pure note played capturing hearts immediately (9)
Cut and hurl piece of spruce wood (10)
I haven't cracked this one yet — but Fifteensquared have:
CHUCK (=hurl, toss) + S <pruce> (“piece of” means first letter only) + TEAK (=wood); chuck is a cut of beef extending from the neck to the shoulder blade
Inane nature of noises fashioned by beginner in guitar (9)
I haven't cracked this one yet — but Fifteensquared have:
G <uitar> (“beginner in” means first letter only) + *(OF NOISES); “fashioned” is anagram indicator
In Disneyland maybe politician takes refuge in wooden shelter (9)
Foreign Office to employ locks expert (9)
Papers lying about excessive returns as before (5)
Put out stove sinking last of lobster (5)
I haven't cracked this one yet — but Fifteensquared have:
RANGE (=stove, e.g. Aga; “sinking last (=last letter) of lobste r ” means letter “r” moves to end of word; to put out is to offend, upset, hence anger
Perhaps squadron guards left in the dark (5)
Suffering 50% cut like army's pork pie supplier (4)
Type letters or click words in the clue