Material supplied by children's families? (7)
I believe the answer is:
kidskin
'material' is the definition.
The definition and answer can be both substances as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'supplied by children's families?' is the wordplay.
'supplied by' means one lot of letters go next to another.
'children' becomes 'kids' ('kid' can be a synonym of 'child').
'families?' becomes 'kin' (I can't explain this - if you can you should give a lot more credence to this answer).
'kids' put next to 'kin' is 'KIDSKIN'.
Can you help me to learn more?
(Another definition for kidskin that I've seen is " Hide material".)