Wedding dress material (4)
I believe the answer is:
lace
'wedding dress material' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lace that I've seen before include "Tear" , "Shoe tie" , "Famous play ''Arsenic and Old . . . .''" , "Fine decorative fabric" , "Shoe string" .)