Something pinned to hem in fabric (9)
I believe the answer is:
grenadine
'fabric' is the definition.
(thesaurus)
'something pinned to hem in' is the wordplay.
'something pinned' becomes 'grenade' (grenades have pins).
'to hem' means one lot of letters goes inside another (hem can mean to enclose).
'grenade' placed around 'in' is 'GRENADINE'.
(Other definitions for grenadine that I've seen before include "Pomegranate juice syrup" , "material" , "Pomegranate cordial" , "silk fabric" , "Cordial made from pomegranates" .)