Cord for sewing (6)
I believe the answer is:
thread
'cord for sewing' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for thread that I've seen before include "Thin strand" , "Dearth of stitching material" , "Strand for sewing" , "Filament; connecting link" , "Fine cord for sewing" .)