I’m late to the party with this one. All completed, but would be grateful for help with parsing on a few.
20a Sometime [erratic] mount steps out of line (4). It’s an old word for ‘mount’, but why steps out of line?
39a Amidst revolutionary speech, Sir Godfrey [sounded] like a monster (6). Revolutionary is backwards? SIRG, but what about the OH?
29d More than one basket case regularly checks [IMDb] film length (6). Means ‘more than film length, then is it just CaSe around (“checks”?) a length of film?
35d Sticky stuff upset beast as circles of Hell clearly show at the top (5). I’m happy with the second half to give the no-grid word. For the first half, sticky stuff defines. Upset beast is UNG. How does ‘as circles’ fit?
Thanks in advance! I’m getting back to it after about 5 months off...