Tequila-based cocktail (9)
I believe the answer is:
margarita
'tequila-based cocktail' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for margarita that I've seen before include "Type of tequila cocktail" , "Cocktail consisting of tequila and lemon juice" , "Tequila and lime cocktail" , "Tequila-based cocktail" , "Stiff drink" .)