Weasel relative (5)
I believe the answer is:
stoat
'weasel relative' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stoat that I've seen before include "Member of the weasel family" , "Eating rabbit, he" , "Ermine in summertime?" , "Small carnivorous mammal of the weasel family" , "Weasel-like mammal" .)