Maureen with musical material (6)
I believe the answer is:
mohair
'material' is the definition.
(mohair is a kind of material)
'maureen with musical' is the wordplay.
'maureen' becomes 'Mo' (short for Maureen).
'with' says to put letters next to each other.
'musical' becomes 'hair' (1960s musical).
'mo'+'hair'='MOHAIR'
(Other definitions for mohair that I've seen before include "coat required" , "It comes from the Angora goat" , "Fabric made from the coat of an Angora goat" , "Fabric made from Angora goat wool" , "Fabric made from silky hair of angora goat" .)