Beat material (7)
I believe the answer is:
worsted
I believe this is a double definition.
'beat' is the first definition.
(thesaurus)
'material' is the second definition.
(worsted is a kind of material)
(Other definitions for worsted that I've seen before include "stuff" , "Beat" , "Stuffed" , "Took to the cleaners" , "Set word (anag.)" .)