Maybe Prokofiev's material (5)
I believe the answer is:
serge
I believe this is a double definition.
'maybe prokofiev's' is the first definition.
(Sergei Prokofiev)
'material' is the second definition.
(serge is a kind of material)
(Other definitions for serge that I've seen before include "Material to suit" , "Twilled fabric; name" , "Frenchman" , "Strong twilled worsted fabric" , "Twilled woollen fabric" .)