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.
(synonyms)

'elbow?' is the wordplay.
'elbow' anagrams to 'BELOW'.
But, I am not clear how this is indicated.

'the' is the link.

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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