Fasten with stitches (3)
I believe the answer is:
sew
'fasten with stitches' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sew that I've seen before include "Stitch with needle and thread" , "Work with needle and thread" , "Make stitches" , "Tack" , "Fasten with needle and thread" .)