Mend with stitches (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
darn
'mend with stitches' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for darn that I've seen before include "Mild oath; repair (socks)" , "Stitch" , "Mend with stitches" , "Repair (sock)" , "Repair by sewing, socks perhaps" .)