Dogs (6)
I believe the answer is:
hounds
'dogs' is the definition.
(hounding is a kind of dogging)
This is the entire clue.
(Other definitions for hounds that I've seen before include "Harasses like hunting dogs" , "Pursues relentlessly" , "'You can't run with the hare and hunt with the . . . . . .'" , "Dogs that go hunting in packs" , "Persecutes with dogs?" .)