Clambering around youngster (4)

I believe the answer is:

lamb

'youngster' is the definition.
(a lamb is a young sheep)

'clambering around' is the wordplay.
'around' indicates the answer is hidden within the clue.
'LAMB' is hidden within 'clambering'.

(Other definitions for lamb that I've seen before include "author?" , "Noted essayist - symbol of innocence" , "Tender sheep meat" , "Youngster" , "essayists?" .)

I've seen this clue in The Mirror.

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