Thanks for the comments everyone, good to know I wasn’t alone in tussling with certain parses (6a esp) and solutions.
A fairly leisurely but quick solve (just over an hour) and throughly enjoyable.
12d my FOI which provided a decent backbone to get started. 21d was a struggle for some reason and this quickly led to 22a which was my penultimate solution, and also my COD.
Still stuck with my last entry 15a and don’t think I’ve seen anybody refer to it in this thread. Any chance of a hint?