Pass a drink (4)

I believe the answer is:

cola

'drink' is the definition.
(cola is a type of drink)

'pass a' is the wordplay.
'pass' becomes 'col' (col is a term for a mountain pass).
'col'+'a'='COLA'

(Other definitions for cola that I've seen before include "Cold drink" , "pop" , "Carbonated soft drink" , "Fizzy drink" .)

I've seen this clue in The Independent and The Times.

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