Across
They join old singer when playing clubs (9,5)
Cut green tree – it might be used for a hedge? (1-4)
Complex issue in question: board meeting with anger (8)
They line the arteries in time: fat essentially providing blockage (7)
I haven't cracked this one yet — but Fifteensquared have:
[f]A[t] in IN TIME – intima is “the innermost coating or membrane of a part or organ, especially of a vein or artery”
Flatten out gold on layer with metal (7)
Women drunk beer: he worked on bars (5)
Early spin in cricket match: play shot with force (4-5)
Playing advantage to break John McEnroe – glad, ultimately at a loss for American (9)
I haven't cracked this one yet — but Fifteensquared have:
ON (playing) PLUS (advantage) in [joh]N [mcenro]E [gla]D – the single S is a US spelling, hence “for Americans”
Traps placed outside small dens (5)
Partners in tight corsets (7)
Fighter is harmful when ignoring the odds: right then left from boxer (7)
I haven't cracked this one yet — but Fifteensquared have:
Even letters of iS hArMfUl + R + [Muhammad] ALI less L
I stir middle of cup vigorously drinking morning coffee in this? (8)
I haven't cracked this one yet — but Fifteensquared have:
AM in anagram of I STIR [c]U[P]
One after wheels? Parking to sit in old Ford (5)
I haven't cracked this one yet — but Fifteensquared have:
P in CAR (wheels) I
Starter of gazpacho with a mostly tough mushroom: it might stop you getting more food (7,7)
Down
As singer noted reviews when touring (6,6)
I haven't cracked this one yet — but Fifteensquared have:
(NOTED REVIEW)* – “As” is a Stevie Wonder song
Like to cut rent for poorest (5)
Brief here? Lap dancing to entertain this writer (9)
Judicial review is through: way to receive pardon for Spaniard (7)
All guys round pinball machine, initially excited: American one with flipper (7)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of the initial letters of All Guys Round Pinball Machine, plus US
Rhythmic music from drum and bass put together (5)
New focus for court’s set in order -- they might take the kids? (9)
Great teaching out of university – son admitted avoiding 13? (12)
I haven't cracked this one yet — but Fifteensquared have:
S in SUPER T[u]ITION
Single friend after bachelor: could be a dishy thing? (4,5)
Cad mainly going out full of energy (9)
Is mash cooked with one Japanese dish (7)
Upset detective bust criminal without resistance (7)
I haven't cracked this one yet — but Fifteensquared have:
DI (Detective Inspector) + R in BUST*
Slam in the lamb, perhaps (5)
Referring to master copy (5)
Type letters or click words in the clue