Relatives of rabbits (5)
I believe the answer is:
hares
'relatives of rabbits' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hares that I've seen before include "Rabbit-like creatures" , "Share of wild animals" , "Fast animals" , "Swift long-eared mammals" , "Shares out the swift little animals" .)