Aid when sewing up chinos in fragments (10)
I believe the answer is:
pincushion
'aid when sewing' is the definition.
(item used when sewing)
'up chinos in fragments' is the wordplay.
'fragments' indicates anagramming the letters (the fragments are put back together differently).
'up'+'chinos'+'in'='upchinosin'
'upchinosin' is an anagram of 'PINCUSHION'.
(Other definitions for pincushion that I've seen before include "Sewer's aid" , "small pad" .)