Join in a joint success! (3)

I believe the answer is:

tie

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'join' is the definition.
(tie can mean to connect or join together)

I don't understand the rest of the clue.

(Other definitions for tie that I've seen before include "around the neck?" , "Join, link" , "Equal score" , "Equal scores" , "sports match" .)

I've seen this clue in the Evening Standard.

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