Conductor reportedly prohibited editorial (10)
I believe the answer is:
bandleader
'conductor' is the definition.
(bandleader is a kind of conductor)
'reportedly prohibited editorial' is the wordplay.
'reportedly' indicates a 'sounds like' (homophone) clue.
'prohibited' becomes 'banned' (synonyms).
'editorial' becomes 'leader' (both can mean a type of newspaper article).
'banned' is a homophone of 'band'.
'band'+'leader'='BANDLEADER'
(Other definitions for bandleader that I've seen before include "Conductor, perhaps" , "He conducted" , "Ted Heath was one" , "Music supremo" , "Top musician" .)