I'm given room for this stuff (5)
I believe the answer is:
denim
'this stuff' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'i'm given room' is the wordplay.
'given' is a charade indicator (letters next to each other).
'room' becomes 'den' (den is a kind of room).
'im' put after 'den' is 'DENIM'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for denim that I've seen before include "Material for casual trousers or jackets" , "Mined (anag)" , "Hard-wearing cloth" , "Cloth for jeans, etc" , "Coloured cotton twill" .)