I'm stuck on the last three:
7d 'A way to turn back time that's frustrating' (4) ?R?T
I can think of several words that fit, but none make sense.
55a 'King in muddle is bitter' (5) H?R?H 'Harsh' seems to be the only possible word, but why?
49d "Get pissed is about right as a figure of speech. ((5) T?O?N
Thorn? but again, no idea how this can be right.
Any input gratefully received!