I've sort of finished. The grid is completed but, for the last few, I had to draw heavily on this forum (thanks to all who posted) and Dan Word's helpful site.
I don't wish to inject a sour note but I can't say I enjoy Maskarade's puzzles overmuch. I found the theme easily (from the anagram at 42) but took ages over the last few clues. 6 across was dreadful and 63 across even worse. It took more than a little bit of help from my friends! I seem to be in a minority but I'd prefer easier clues and a more challenging theme..