Accusation by theatre where fiddler played? (7)
I believe the answer is:
reproof
'accusation' is the definition.
(a reproof is an accusation or reprimand)
'by theatre where fiddler played?' is the wordplay.
'by' is a charade indicator (letters next to each other).
'theatre' becomes 'rep' (repertory theatre).
'where fiddler played?' becomes 'roof' (as in the musical Fiddler on the Roof).
'rep'+'roof' is 'REPROOF'.
(Other definitions for reproof that I've seen before include "Once more get water-resistant" , "Censure" , "Ticking off" , "Rocket" , "what mac no longer keeping one dry needs?" .)