Climbing round branch (4)

I believe the answer is:

limb

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

'branch' is the definition.
(I know that limb is a type of branch)

'climbing round' is the wordplay.
'LIMB' is hidden within the letters.
But, I am uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for limb that I've seen before include "Eg, arm, leg" , "Bough" , "Large tree branch" , "Wing, perhaps" , "Part of body or branch of tree" .)

I've seen this clue in The Mirror.

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