Close-knit criminals, perhaps, Force can part (4-4)

I believe the answer is:

ring-pull

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'can part' is the definition.
(part of a drinks can)

'close-knit criminals perhaps force' is the wordplay.
I cannot quite understand how this works, but
'force' could be 'pull' (synonyms) and 'pull' is located in the answer.
The remaining letters 'ring' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

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