Thanks, geeker. That makes sense re 10a, the parsing of which I’ve worried over for far too long in an otherwise very straightforward prize. (I saw rainman’s post at 9 which suggested an error, but still couldn’t work out what the error might be, and as no one initially followed up and it hadn’t previously been mentioned, I still thought there might be a parsing of the clue as it stood that I couldn’t see).
No thanks to whoever formatted the crossword for the website for wasting my time!