Here’s where you have your questions resolved!
Update: and here are my questions:
13 down: Fox’s forte: programme hub in top retentive quality (10)
Got the answer, missed the explanation.
5 down: Endeavour botanist thus a fisherman? (8)
14 across: High road… (8)
I’m sure this one’s easy and that I’ll be disappointed at having missed it.
22 down: Ringmaster makes bet about no ring vanishing? (6)
No answer, no real idea how to approach it either.
24, 22 across: Two days sorting through endless trash (4, 6)
I’m betting I’ve never heard of this person.