Crossword Genius

Officer who sounds a bit of a nut (7)

Ross

I believe the answer is:

colonel

'officer' is the definition.
(colonel is a kind of officer)

'sounds a bit of a nut' is the wordplay.
'sounds' shows a homophone (sound like).
'a bit of a nut' becomes 'kernel' (edible part of a nut).
'kernel' is a homophone of 'COLONEL'.

'who' is the link.

(Other definitions for colonel that I've seen before include "Comissioned military officer" , "Rank (below brigadier)" , "Commander" , "Senior army officer" , "Military rank" .)

I've seen this clue in The Globe and Mail.
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