I have to admit that it's got me beaten this week. Two clue left which I can't fathom out.
21A Change parts in rehearsal and come to an end (3,3) R?N,?R?
I can't find anything to fit in here.
6D Many follow players who get draw (4,4) ?E?T,?O?S
The second one could be PEAT MOSS, BEST BOYS or even RENT BOYS, but none really fit.
The star clue this week was:
13D To do this involves permeating (10)