Carnivorous mammals related to stoats (7)
I believe the answer is:
weasels
'carnivorous mammals related to stoats' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for weasels that I've seen before include "vermin" , "Carnivorous mammals related to stoats" , "Stoat-like creatures" , "Sales we make of the animals" , "Carnivorous mammal with short legs and long body" .)