Very interesting grid shape, giving you way more clues than you'd normally see in a full-sized blocked grid (40, as opposed to ~32), but I liked a lot of the fill!
So far as surfaces go, I liked 14A, 26A, 9D, and 16D a lot, as well as 17A, 31A, and 4D.
Thoughts:
1A: I think this is meant to be DOOF(U)S*, but I'm not sure where the U comes from; is it [suitable] as the anagram indicator and [for all] as a U[niversal] abbreviation that's being accomodated?
13A: I think [goes] on its own is not enough for an anagrind; [goes off] maybe?
23A: Is the first C coming as an indirect anagram off [caught] for C? Not a usage I'm familiar with, but it's the only thing I can see.
30A: Is [tiny hole] meant to be a homophone for /eye/?
37A: I've never heard of the SKS rifle, so that was a tough one to solve.
7D: Just figured this out as TA+C+IT; very clever, but hard.
32D: I think if [Mostly] is a curtailment, it needs to precede (or follow) the word it is shortening, so [A maiden mostly] would play fairer to me.