Clambering round youngster (4)

I believe the answer is:

lamb

I'm a little stuck... Click here to teach me more about this clue!

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

'clambering' is the wordplay.
'LAMB' is hidden in amongst the letters.
However, I'm not sure how this is indicated.

'round' is the link.

Can you help me to learn more?

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

I've seen this clue in The Mirror.

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