Crossword Genius

Drinking bender? (5)

Ross

I believe the answer is:

elbow

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

This might be a double definition.

'drinking' is the first definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'bender' is the second definition.
(something which bends)

Can you help me to learn more?

(Other definitions for elbow that I've seen before include "Major arm joint" , "part of the body" , "sack?" , "push" , "Below (anag.)" .)

I've seen this clue in The Sun and The Globe and Mail.
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