Fur that's a symbol of royalty (6)
I believe the answer is:
ermine
'fur that's a symbol of royalty' 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 "Animal with brown fur that turns white in winter" , "Fur for an English judge" , "Fur trimming on royal robes" , "Ceremonial fur" , "Stoat in northern regions" .)