Keats or Tennyson (4)
I believe the answer is:
poet
'keats or tennyson' is the definition.
(I know that John Keats has the occupation poet)
This is the entire clue.
(Other definitions for poet that I've seen before include "Bridges possibly" , "One writing verse" , "Burns, for example" , "Minstrel" , "Pound, say" .)