Thanks to Brummie for what was, for ma anyway, a very tricky Prize puzzle.
Thankfully the few longish anagrams allowed me to get a foothold.
I still can't parse 13a, although I am certain of my answer. I'm assuming the middle 2 letters are "male circle backed", but I can't get any further than that.
COD:- I quite liked the simplicity of 7d but I think 23d just edges it.