8 down: Celebrated red jelly after race meet (7)
Great direct definition disguise: jelly after race meet = ky after trots = Trotsky = celebrated red.
14 across: Clue not unravelled by breakfast patriarch (5, 4)
Another great direct clue: clue not unrivalled = uncleto by = Uncle Toby = breakfast patriarch.
13 across: Lite 18-down (in reach)? (5)
Another great one: lite = lo cal = local = in reach.
25 across: Black dog with frequent flyer points? (9)
A little easy, but good: black dog = jet setter = jetsetter = with frequent flyer points.
19 down: Where you may plunge into philosophical objective? (4, 3)
Clever: where you may plunge into = deep end = philosophical objective.
23 across: Bully boxes to be close, almost, to actor (5, 4)
bully boxes to be close, almost = cow boxes live end almost = Clive Owen = actor.
17 across: Giant dozer transport to glisten first off? (3, 6)
Nice one: transport to glisten first off = van twinkle first off = Van Winkle = giant dozer.