Take aim at earthenware vessel (3)
I believe the answer is:
pot
I believe this clue is a double definition.
'take aim at' is the first definition.
(pot can mean to shoot at)
'earthenware vessel' is the second definition.
(I've seen this in another clue)
(Other definitions for pot that I've seen before include "Slangy cannabis" , "Trophy; kitty" , "Bowl" , "Kitty; marijuana" , "Preserve; drug" .)