Possibly grips a branch (5)

I believe the answer is:

sprig

'a branch' is the definition.
(sprig is a kind of branch)

'possibly grips' is the wordplay.
'possibly' indicates an anagram.
'grips' is an anagram of 'SPRIG'.

(Other definitions for sprig that I've seen before include "A tack; a little shoot" , "Stem of holly, for example" , "Small spray of leaves or flowers" , "Tree shoot; headless nail" , "A child" .)

I've seen this clue in the Evening Standard.

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