White weasel (6)
I believe the answer is:
ermine
'white weasel' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ermine that I've seen before include "Stoat's winter fur" , "White fur worn by some judges" , "Fur trimming on royal robes" , "White fur of stoat" , "White fur from kind of 25 Across - judges may wear it" .)