Beneath the elbow? (5)

I believe the answer is:

below

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

'beneath' is the definition.
('below' can be a synonym of 'beneath')

'the elbow?' is the wordplay.
'elbow' can be anagrammed to 'BELOW'.
But, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for below that I've seen before include "Feel miserable" , "Lower than" , "second-rate" , "in one's cabin" , "Inferior" .)

I've seen this clue in the Evening Standard.

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