surgeon's seam (6)
I believe the answer is:
suture
'surgeon's seam' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for suture that I've seen before include "Stitches (in wound)" , "Stitching for a wound" , "Thread for sewing up wound" , "Surgical stitching" , "Surgical stitch to close wound" .)