Small hunting dog (6)
I believe the answer is:
beagle
'small hunting dog' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for beagle that I've seen before include "Breed of dog in a glebe" , "Small short-legged hound" , "Darwin voyaged in this ship" , "Type of hound" , "Hound dog" .)