Crossword Genius

Wine succeeded leaving jar (4)

Ross

I believe the answer is:

hock

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'wine' is the definition.
(hock is a kind of wine)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for hock that I've seen before include "Buy property, say" , "German white wine from Rhineland" , "Leg joint on horse e.g." , "to leave with uncle" , "Deposit with a pawnbroker" .)

I've seen this clue in The Sun.
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