Wild cat with tufted ears (4)
I believe the answer is:
lynx
'wild cat with tufted ears' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lynx that I've seen before include "Keen-eyed feline" , "Keen-eyed cat" , "Member of the cat family" , "Wild cat; sounds like chain" , "One with sharp eyes" .)