Come and see smoke (4,2)

I believe the answer is:

roll up

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'smoke' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for roll up that I've seen before include "smoke" , "Fairground barker's exhortation" , "Home-made cigarette" , "Arrive -- handmade cigarette (4,2;4-2)" , "Salesman's cry" .)

I've seen this clue in The Guardian.

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