Swinish (7)
I believe the answer is:
porcine
'swinish' is the definition.
(I know that swinish can be written as porcine)
This is all the clue.
(Other definitions for porcine that I've seen before include "Of or like a pig" , "Corn pie (anag.)" , "Piggy" , "Piggish" , "Of pigs" .)