Across
Install incomer's IT equipment (8)
Finally grant beneficiaries what belongs to them (6)
I haven't cracked this one yet — but Fifteensquared have:
final letter of [gran]-T, plus HEIRS="beneficiaries"
24a
Begin with famous aristocrat (5,3)
Garlanded girl secures points of law (10)
I haven't cracked this one yet — but Fifteensquared have:
GAL="girl" in LEI (garlanded / wearing a lei); plus TIES="secures"
14a
Trouble with food from tagine (6,8)
See 12
Takes up arms and starts to repel enemy units (7)
I haven't cracked this one yet — but Fifteensquared have:
first letters ("starts") to R-[epel] and E-[nemy], plus VOLTS="units" of electrical potential
Surprise regarding 50% refund (7)
22a
Sign in private at their office? (8,6)
See 20
Go back with hesitation after a short walk for one into stars (10)
I haven't cracked this one yet — but Fifteensquared have:
GO reversed/"back", plus ER="hesitation"; after A + STROL-[L]="short walk"
See 10
Ulster troubled in consequence (6)
Young lady, fur is wrong (8)
Down
Stole tiny amount to get to sporting event (4,4)
Fight using weapon heartlessly (4)
From Borstal, a ghastly prison (6)
Hear about old and sad story (7)
Is inclined to follow pen designers (8)
Landlord home contents in B&B that might blow up (6,4)
I haven't cracked this one yet — but Fifteensquared have:
LETTER=someone who lets a property="Landlord", plus inner letters ("contents") of [h]-OM-[e] inside BB
They say soft cheeses give you wind (6)
Pagan vow so ultraradical (10)
I haven't cracked this one yet — but Fifteensquared have:
I DO=marriage "vow"; plus anagram/"radical" of (so ultra)*, with ultra//radical split in two parts
Holiday rentals for threesome (8)
Fix dossier's digital enhancer (8)
I'm gay, so in need of modification for reproductive method (7)
Aphrodisiac supposedly taken by schoolboys? Terrific! (6)
Nation's heard and read (6)
Extremely thrifty, penny-wise sort (4)
Type letters or click words in the clue