Shoe fastener (4)
I believe the answer is:
lace
'shoe fastener' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lace that I've seen before include "Delicate fabric woven in an open web" , "Fine needlework" , "Fine decorative fabric" , "Flimsy fabric or shoe fasterner" , "Shoestring: delicate ornamental fabric" .)