A second drink (5)

I believe the answer is:

shake

I believe this is a double definition.

'a second' is the first definition.
(thesaurus)

'drink' is the second definition.
(milkshake)

(Other definitions for shake that I've seen before include "Rattle" , "Tremble, vibrate" , "Shiver" , "moment" , "Judder" .)

I've seen this clue in the Evening Standard.

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