Very tricky in places but some generous anagrams to even things out a bit and allow solvers to at least get a foothold.
Too tired to give a in-depth review (I know, no doubt you're all devestated but try and soldier on as best you can 😪)
I do have a few of queries though...
23a - I'm not at convinced the answer matches the defibition (assuming I have the right answer, of course) and...
11a - While I get how the answer is "what's prior to this" and also a "contribution fron Ximenes", I can't see the "(before 1000)" part...
5d - If it's just a cryptic definition then that's fine (although post CK in the field of US sport, doesn't it now have a completely different meaning? - sorry to be so vague but I don't want to give spoilers). However, some of the letters in the clue also appear in the answer so I wonder if there's something I'm missing.
Thanks to Brendan for a challenging puzzle that really put me through my paces. Still, glad to know that, like me, he's also very playful and 2d 😂
Stay safe:-)