Pound of butter? (3)
I believe the answer is:
ram
I believe this clue is a double definition.
'pound' is the first definition.
(I know that pound can be written as ram)
'butter?' is the second definition.
(I've seen this in another clue)
'of' is the link.
(Other definitions for ram that I've seen before include "barge" , "man with many partners?" , "Computers need it to operate" , "Strike violently" , "Pound" .)