Wild hog
I believe the answer is:
boar
'wild hog' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for boar that I've seen before include "A wild male pig" , "Male swine" , "Wild animal, sounds like drill" , "The head for drink Falstaff had" , "Uncastrated male hog" .)