Pawn a knuckle of meat (4)

I believe the answer is:

hock

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'pawn' is the definition.
(hock can mean to pawn an item at a pawnbroker's)

I don't understand the rest of the clue.

(Other definitions for hock that I've seen before include "Dry Rhine wine" , "Dry white wine" , "Dry wine; joint; pawn" , "German wine -- horse's back 'ankle'" , "to leave with uncle" .)

I've seen this clue in The Mirror.

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