Writer is prohibited, we hear (4)
I believe the answer is:
bard
'writer' is the definition.
(I know that bard is a type of poet)
'prohibited we hear' is the wordplay.
'prohibited' becomes 'barred' (barring is a kind of prohibiting).
'we hear' indicates a 'sounds like' (homophone) clue.
'barred' sounds like 'BARD'.
'is' is the link.
(Other definitions for bard that I've seen before include "Epic poet" , "A lyric poet" , "Traditional poet" , "Celtic poet" , "Poet - prophet" .)