Container; drug (3)
I believe the answer is:
pot
I believe this clue is a double definition.
'container' is the first definition.
(I know that pot is a type of container)
'drug' is the second definition.
(slang term for cannabis)
(Other definitions for pot that I've seen before include "prize" , "Cooking vessel, plant container and street drug" , "Street name for cannabis" , "Trophy; kitty" , "Grass" .)