Bet he's in command (6)

I believe the answer is:

behest

'command' is the definition.
(behest is a kind of command)

'bet he's in' is the wordplay.
'in' means one lot of letters goes inside another.
'bet' placed around 'hes' is 'BEHEST'.

(Other definitions for behest that I've seen before include "Order" , "Command - Thebes (anag)" , "(At someone's) command" , "Command, bidding" .)

I've seen this clue in The Telegraph.

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