26 across: Garish gear short about $100 (7)
The answer is kitschy, which I suppose means either garish or garish gear. I have nothing else.
12 across: Literary lion obliterated small boy (4)
Which part of this clue is the synonym or synecdoche for alan?
1 across: Before circling in, produces contraceptive (3, 4)
The direct clue is so clear that the pill is very easy to get out, but the explanation is another matter.
13 across: Alternate point to be accepted by European ministers (5, 5)
This one is really confusing. The answer is front bench.
21 down: US Jewish novelist half-accepts another knocking shop (7)
Roth is the US Jewish novelist, but I’m really not sure how brothel is produced from the rest of the clue, nor am I sure whether or not brothel = knocking shop or just brothel = shop.