Butter container (3)
I believe the answer is:
tub
'butter container' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tub that I've seen before include "A ranting preacher informally thumps it" , "Unwieldy boat" , "old boat?" , "Low wide container" , "Open container, for liquid say" .)