White fur (7)
'white fur' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ermine that I've seen before include "Fur-bearing mammal" , "'Trimming on royal robes, say (6)'" , "Stoat's winter fur" , "Regal fur" , "White fur of weasel" .)
'white fur' is the definition.
(I've seen this before)
This is the entire clue.
(Another definition for miniver that I've seen is " White fur used in ceremonial costumes".)