Short-tailed weasel
I believe the answer is:
stoat
'short-tailed weasel' 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 "Small carnivore" , "Weasel-like mammal" , "Eating rabbit, he" , "Ermine in summertime?" , "Small carnivorous mammal of the weasel family" .)