apologies to those who struggled, but i thought this was another grauniad cock-up and they published the quiptic here by mistake. i just have 16d to parse.
pedantically, the definition for 1a is wrong.
favourite also 19d, though "a" is misleading.
I don't understand how there can be a Prize crossword when all the solutions are available via a simple online search. I only do this BTW when I am 85% sure and need reassurance.