Crossword Genius

Drink for lookalike (6)

Ross

I believe the answer is:

double

This clue is a double definition.

'drink' is the first definition.
(double shot of alcohol)

'look-alike' is the second definition.
(I've seen this in another clue)

'for' acts as a link.

(Other definitions for double that I've seen before include "Two times" , "Offence of leaving one's car where it blocks another" , "Second charge for the same offence" , "Twice - bent over - run" , "Ringer - large drink" .)

I've seen this clue in The Mirror.
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