This fell into place nicely for me over, er, the thematic period, though I too took a while to figure the fifth word out, and that’s a small weakness in an otherwise very elegantly constructed grid.
I found a few of the clues a little chewy, and although I’m confident of my answers I’m struggling to pin down all the wordplay of just a couple that I don’t think have been mentioned so far, so if anyone can give me a nudge to put my mind at rest I’d be very grateful.
36 “Left star turns in musical set about now”, I don’t see where the last three words fit in: the clue would seem to work fine without them.
15 “East London’s strapping miser reformed”, I don’t see where East London fits in.
I saw the discussion of 37 “Made it hard to find hotel for festival’s beginning”. My only puzzle with this is that what needs to replace the festival’s beginning is not in fact attested in BRB as an abbreviation for the clue word as far as I can see, though it would be logical enough. Have I missed something here?