Little pigs count (5)
I believe the answer is:
three
'little pigs count' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for three that I've seen before include "Snooker score for potting green ball" , "A crowd, you might say" , "Square root of nine" , "Figure" , "One, one, one" .)