Horses; badgers (4)
I believe the answer is:
nags
I believe this is a double definition.
'horses' is the first definition.
(nag is a kind of horse)
'badgers' is the second definition.
(I've seen this in another clue)
(Other definitions for nags that I've seen before include "Constantly reproaches and complains" , "Scolds constantly" , "Annoys" , "Constantly finds fault" , "Scolds continually" .)