Lovely puzzle, with some very fine clues and wordplay, including (especially?) several of the thematics. I don’t think I’d quite agree that the puzzle can be fully “solved” without using the eight thematics at all — sure, you can surmise what the unches might be, and try to match them up with definitions, which is indeed exactly what I did, but there’s a lot of guesswork there: I wouldn’t have been happy to send it in until I’d gone through seeing how each is obtained from a review, and I think that’s still a key (and fun) step even if, as I did, it’s the last bit you do and only confirms what you’d tentatively put in! And in a couple of cases, like the already mentioned 37a, you couldn’t be entirely sure which spelling was required until figuring out the review. And the thematics were so groan-inducingly ingenious that I’m glad there were several ways around to give me confidence! Many thanks smudge, for the latest in a run of cracking puzzles this year already.
I take it no one else has had stats through yet? Just checking :-)