Material named for its use (6)
I believe the answer is:
tissue
'material' is the definition.
(tissue is a kind of material)
'named for its use' is the wordplay.
'named' becomes 'sue' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'for' says to put letters next to each other (I've seen this in other clues).
'use' is an anagram indicator (I've seen 'used' mean this).
'its' is an anagram of 'tis'.
'sue' put after 'tis' is 'TISSUE'.
Can you help me to learn more?
(Other definitions for tissue that I've seen before include "Sneeze catcher?" , "Web; fabric" , "load of lies?" , "Cells sharing a function" , "Paper hankie" .)