Cryptic crossword No 891

Cheers Methuselah, that was quite the workout for this little brain, and I ended up exploiting the Check button a bit towards the end! I don’t suppose you have annotated solutions, do you? I’d like to check a few parsings. And Merry Christmas!

I started doing this then realized I had already seen it video solved on Cracking The Cryptic :) Top-rate puzzle of course.