Wildcat with tufted ears (4)
I believe the answer is:
lynx
'wildcat with tufted ears' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for lynx that I've seen before include "one with exceptionally good sight" , "Cat - northern constellation" , "European wild cat" , "Northern short-tailed wild cat(s)" , "Wild cat -- text browser" .)