Bad actors ruined programme (9)
I believe the answer is:
broadcast
'programme' is the definition.
('broadcast' can be a synonym of 'programme')
'bad actors ruined' is the wordplay.
'ruined' indicates anagramming the letters.
'bad'+'actors'='badactors'
'badactors' anagrammed gives 'BROADCAST'.
(Other definitions for broadcast that I've seen before include "Transmit over airwaves" , "Put on the air" , "Transmit by radio or TV" , "Transmit (programme)" , "Transmit by radio/TV" .)