Boar or sow (3)
I believe the answer is:
pig
I believe this clue is a double definition.
'boar' is the first definition.
(boar is a type of pig)
'sow' is the second definition.
(I've seen this in another clue)
(Other definitions for pig that I've seen before include "Farm animal" , "Difficult task" , "Boar or sow" , "One scoffs" , "Sow, perhaps" .)