Let Maria weave fabric (8)
I believe the answer is:
'fabric' is the definition.
(I know that fabric can be written as material)
'let maria weave' is the wordplay.
'weave' is an anagram indicator.
'letmaria' is an anagram of 'MATERIAL'.
(Other definitions for material that I've seen before include "Fabric, stuff" , "Essential" , "Fabric or other substance" , "Matter; fabric" , "Substantial -- textile" .)