Ornamental tuft (6)
I believe the answer is:
tassel
'ornamental tuft' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tassel that I've seen before include "Hanging ornament" , "Part of a flower" , "Grapefruit and tangerine hybrid" , "Ornamental hanging tuft" , "Decorative bunch of cords" .)