Material from grand composer (6)
I believe the answer is:
gravel
'material' is the definition.
(gravel is a kind of material)
'grand composer' is the wordplay.
'grand' becomes 'g' (G is short for grand as in a thousand).
'composer' becomes 'Ravel' (Maurice Ravel).
'g'+'ravel'='GRAVEL'
'from' is the link.
(Other definitions for gravel that I've seen before include "Small rounded stones" , "Small fragments of rock" , "Small loose stones" , "Small stones on paths" , "Grit" .)