Throw a cocktail (5)
I believe the answer is:
sling
I believe this clue is a double definition.
'throw' is the first definition.
(chuck means throw as does sling)
'a cocktail' is the second definition.
(sling is a type of cocktail)
(Other definitions for sling that I've seen before include "throwing implement like catapult" , "Simple weapon; throw" , "Arm bandage; hurl" , "ballistic weapon" , "shy" .)