Superfluous ornament (5)
I believe the answer is:
frill
'superfluous ornament' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for frill that I've seen before include "Gathered material" , "Shared feature of Mr Punch, Richard III" , "Gathered strip as a trimming" , "A decorative gathering of fabric" , "Ruche; ruff" .)