Tuft of feathers (5)
I believe the answer is:
crest
'tuft of feathers' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for crest that I've seen before include "Summit - emblem - cockscomb" , "Peak - comb" , "Highest point" , "Plume on a helmet" , "Heraldic device representing a family" .)