Quilting square (5)
I believe the answer is:
patch
'quilting square' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for patch that I've seen before include "Mend with piece of material" , "Material used to cover a tear" , "Piece of land, of mending material" , "Covering material" , "Mend with extra piece" .)