Cleaner drink? (4)

I believe the answer is:

char

This clue is a double definition.

'cleaner' is the first definition.
(char can mean a cleaner)

'drink?' is the second definition.
(I've seen this before)

(Other definitions for char that I've seen before include "toast far too much?" , "Person who cleans" , "Partly burn - cleaning woman" , "Daily cleaner; burn" , "Make black by burning, or a small trout" .)

I've seen this clue in the Evening Standard.

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