Grumble about watch (7)
I believe the answer is:
chunter
'grumble' is the definition.
(I've seen this before)
'about watch' is the wordplay.
'about' becomes 'c' (circa).
'watch' becomes 'hunter' (type of watch).
'c'+'hunter'='CHUNTER'
(Other definitions for chunter that I've seen before include "Rabbit" , "Talk monotonously" , "Go on" , "beef" , "Mutter" .)