Bird box commotion (7)

I believe the answer is:

sparrow

'bird' is the definition.
(sparrow is a kind of bird)

'box commotion' is the wordplay.
'box' becomes 'spar' (sparring is a kind of boxing).
'commotion' becomes 'row' (a row is an argument or commotion).
'spar'+'row'='SPARROW'

(Other definitions for sparrow that I've seen before include "Pirate" , "A small chirpy city bird 97)" , "Robin's slayer" , "Bird with cockney associations" , "(Formerly very) common British bird" .)

I've seen this clue in The Guardian.

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