Cram; material (5)
I believe the answer is:
stuff
I believe this is a double definition.
'cram' is the first definition.
(I know that stuff is a type of cram)
'material' is the second definition.
(I know that material can be written as stuff)
(Other definitions for stuff that I've seen before include "Material; eat lots" , "Fill completely" , "facts" , "Material; fill full" , "Miscellaneous objects" .)