Crossword Genius

Grumble incessantly about watch (7)

Ross

I believe the answer is:

chunter

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'grumble' is the definition.
(I've seen this before)

'incessantly about watch' is the wordplay.
'incessantly about' becomes 'c' (circa abbreviation. I am not sure about the 'incessantly' bit.).
'watch' becomes 'hunter' (type of watch).
'c'+'hunter'='CHUNTER'

Can you help me to learn more?

(Other definitions for chunter that I've seen before include "Rabbit" , "Go on" , "Mutter" , "beef" , "Grumble monotonously" .)

I've seen this clue in The Guardian.
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