"Shaken, not stirred" cocktail (7)
I believe the answer is:
martini
'shaken not stirred cocktail' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for martini that I've seen before include "Cocktail of gin and dry vermouth" , "Sienese painter" , "rifle" , "In glass, one's dry" , "Gin or vodka with dry vermouth" .)