Material for study I'm making (5)
I believe the answer is:
denim
'material' is the definition.
(type of fabric)
'study i'm making' is the wordplay.
'study' becomes 'den' (term for a study or office).
'i'm' becomes 'i' (I've seen this in other clues).
'making' becomes 'm' (this could be a standard abbreviation which I don't know about).
'den'+'i'+'m'='DENIM'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for denim that I've seen before include "Mined (anag)" , "Hard-wearing material seen in jeans" , "Tough cotton fabric" , "Cloth for jeans, etc" , "Twilled cotton fabric" .)