19 down: Slam a rug with 15-across (no time) for hat (6)
Hat = panama, slam = pan and I’m assuming a = a, but how does ma = rug with no time?
13 across: It crushes articles by 9-across (McCubbin) colleague, say (8)
A DA special: a skeletal subject pronoun and a verb is the direct clue in it crushes = anaconda. What makes sense is articles = ana, but that means McCubbin colleague, say = Conda, which I don’t understand and the internet has not been able to help me out on.
24 down: Acidity behind aspiring lowlife? (5)
I’m guessing acidity = oomph; the rest, though?
20 down: Overly 22-down (cling) to plane, nonetheless? (7)
Overly cling = smother, but what does that have to do with smother = to plane, nonetheless?
17 across: Cement, in part, lasts during any cheap renovations, you claim (6)
This one we only got because of the cross clues, and after cement = gypsum is worked out, what’s going on with the rest?