I agree with s_pugh about 15a, which for me is an &lit that doesn't quite come off. That and 3d were my last solves and although I'd earlier considered the answer for 15 I was not convinced until I determined what letter was needed to complete the left-hand column. It's years since I read the book, but I don't think the Chambers definition, with it's important six-letter adjective, is an accurate description of the incident.
Minor quibble out of the way, I thought it was an excellent puzzle with lots of fine clues, great fun to solve. Unlike some, the theme wasn't obvious to me at the start. In fact it wasn't obvious until I spotted a likely expression from the rejects. Until then I was thinking cartoons.
On an editorial matter, this is the second time recently that a Scrabble dictionary has been given as a reference. In the case of an unfamiliar word that is not a variant of a Chambers word one needs to check the meaning, so a dictionary, not a Scrabble list, is essential, however straightforward the wordplay. I checked my answer to 30d on the internet and found it appears in at least three dictionaries, so why isn't one of those given as the non-standard reference? Seems bizarre to me.