I sell spun fabric (5)
I believe the answer is:
lisle
'fabric' is the definition.
(I know that lisle is a type of fabric)
'i sell spun' is the wordplay.
'spun' is an anagram indicator.
'i'+'sell'='isell'
'isell' with letters rearranged gives 'LISLE'.
(Other definitions for lisle that I've seen before include "Fine smooth cotton thread for stockings" , "Pedestrianised city" , "Strong cotton fabric" , "Fine cotton thread used in stockings" , "Cotton stocking thread" .)