Nelson or Hornblower? (7)
I believe the answer is:
horatio
'nelson or hornblower?' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for horatio that I've seen before include "Hamlet's friend: Hornblower's first name" , "Nelson or Hornblower?" , "part of Hamlet" , "- Nelson, British admiral" , "Nelson's given name" .)