Writer of verse proscribed on radio (4)
I believe the answer is:
bard
'writer of verse' is the definition.
'proscribed on radio' is the wordplay.
'proscribed' becomes 'barred' (barring is a kind of proscribing).
'on radio' shows a homophone (sound like).
'barred' is a homophone of 'BARD'.
(Other definitions for bard that I've seen before include "Animal; cruel person" , "Eisteddfod winner" , "A lyric poet" , "Traditional poet" , "Poet; sounds like forbidden" .)