Further to this posting, I have for 80a...Long to perform hit number in..ITCH.
For 81d..Run up to, right after, I am left with, T-o-. Must be trot.
Easy clue for 81d is JOY, as previosly stated.
I think this is a misprint (this crossword has form in this respect) and should be JOG. Does this fit with anyone?