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' is the wordplay.
'may be' indicates an anagram.
'these' with letters rearranged gives 'SHEET'.
'used to make' is the link.
(Other definitions for sheet that I've seen before include "Bedcover" , "Mattress cover" , "Piece of paper; nautical rope" , "newspaper" , "Set of unseparated stamps" .)