These may be used to make paper (5)
I believe the answer is:
sheet
'paper' is the definition.
(sheet is a kind of paper)
'these may be used' is the wordplay.
'may be used' is an anagram indicator.
'these' anagrammed gives 'SHEET'.
'to make' acts as a link.
(Other definitions for sheet that I've seen before include "Bedcover" , "Mattress cover" , "Piece of paper; nautical rope" , "newspaper" , "Set of unseparated stamps" .)