Small firms get together over a drink (5)

I believe the answer is:

cocoa

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'drink' is the definition.
(I know that cocoa is a drink)

I don't understand the rest of the clue.

(Other definitions for cocoa that I've seen before include "Nighttime drink" , "Hot bedtime drink" , "Medium to dark brown" , "Chocolate ingredient" , "Hot brown drink" .)

I've seen this clue in The Globe and Mail and The Guardian.

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