Watch - he's after something! (6)
I believe the answer is:
hunter
'watch' is the definition.
(type of watch)
'he's after something' is the wordplay.
I cannot quite understand how this works, but
'he' could be 'hunt' and 'hunt' is located in the answer.
The remaining letters 'er' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for hunter that I've seen before include "someone on safari" , "trapper" , "Watch with hinged cover" , "See 10" , "Type of fob watch" .)