Across
Likes to include piece of music in gymnastic exercise (8,4)
Brought on board after failing company made a decision (5)
I haven't cracked this one yet — but Fifteensquared have:
CO -OPTED=”Brought on board”, losing/failing CO for “company”
Are reckless Don and him (EM) attacking opponents’ characters? (2,7)
I haven't cracked this one yet — but Fifteensquared have:
A is short for “Are” (metric land measure, 100 sqm), plus anagram/”reckless” of (Don him em)*
Colour not on visual spectrum, one adopted by dissolute artist (7)
I haven't cracked this one yet — but Fifteensquared have:
UV (Ultra Violet, “Colour not on visual spectrum”) + I=”one”, both inside (adopted by) FAST=rash/promiscuous/”dissolute”
Playwright increasingly accepting story (7)
Places for mixologists in prison? (6,4)
City each year filled with heartless Italians? (4)
I haven't cracked this one yet — but Fifteensquared have:
PA (per annum, “each year”), filled with I-[talian]-S “heartless” without the inner letters
Time right to bring in new revolutionary measure of speed (4)
I haven't cracked this one yet — but Fifteensquared have:
T (Time) + OK=”right”, around N (new); all reversed/”revolutionary”
Member of orchestra having fish served with trifle (4,6)
Life tutor ignoring a source of green energy? (7)
Cheers monarch going to Southern gate (7)
Bar moving one supporter (9)
I haven't cracked this one yet — but Fifteensquared have:
Edit thanks to prospero and Quirister in the comments: BRASSERIE=”Bar”, moving the I=”one” a few place earlier to make BRASSIERE Original: Bar “moving one” letter gives ‘bra’ i.e. BRASSIERE
Deserved to bag round in fight (5)
I haven't cracked this one yet — but Fifteensquared have:
JUST=”Deserved” around (to bag i.e. to take, to secure) O=”round” letter
Strain to see Trump, say, having certain behaviour found in groups (4,8)
Down
Moving picture about husband and love? His love’s considered a handful (9)
I haven't cracked this one yet — but Fifteensquared have:
PETRUCHIO is the male protagonist in Shakespeare’s The Taming of the Shrew [wiki] , in which “His love” Katherina is considered ‘shrewish’ anagram/”Moving” of (picture)*, around H (husband); plus O=”love” (tennis)
Storm enveloping two-thirds of more unsettled star (3,5)
Minimum area, small, included in rent (5)
I haven't cracked this one yet — but Fifteensquared have:
A (area) + S (small); both inside LET=”rent” as a verb
Corrupt empires imprisoning the man producing almanac (9)
I haven't cracked this one yet — but Fifteensquared have:
definition: an astronomical almanac anagram/”Corrupt” of (empires)*, around HE=”the man”
Minor official’s bottom, pornographic, not for the refined? (6)
I haven't cracked this one yet — but Fifteensquared have:
BUM=”bottom”, plus BL-[U]-E=”pornographic” minus U (not U = not upper-class = not for the refined)
Fashion bringing in new collection of styles (5)
Discussion implying support for right-wing views? (6)
Simple creature, nameless one in possession of a business degree? On the contrary (6)
I haven't cracked this one yet — but Fifteensquared have:
O-[n]-E=o n e without ‘ n ‘ for name=”nameless one” A + MBA (Masters in Business Administration)=a business degree “On the contrary” means that instead of OE going around (possessing) A MBA; instead A MBA goes around OE
Summer clothing to support accommodating every individual width (9)
I haven't cracked this one yet — but Fifteensquared have:
BEAR=”support” around: EACH=”every individual” and W (width)
Contract, one getting navy a lot of choppers? (9)
I haven't cracked this one yet — but Fifteensquared have:
I=”one” + N (navy) + DENTURE=”a lot of choppers” (as in choppers=teeth)
Animal perversion a Judge banned? Not entirely (8)
Some glamorous babe keeps up the cooked meat (6)
Substitute located in the heart of Germany? Not initially (6)
Stunning item about Pasquale’s latest puzzle (6)
I haven't cracked this one yet — but Fifteensquared have:
TASER=”Stunning item” around the last/”latest” letter in [Pasqual]-E
Speak in great detail, forgetting note (5)
Article on limits of weakness or strength (5)
Type letters or click words in the clue