Pieces of paper (6)
I believe the answer is:
sheets
'pieces of paper' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sheets that I've seen before include "Pieces of paper or bedclothes" , "She set them on the bed" , "Bedclothes, sailing ropes and paper" , "They get blanket coverage" , "Flat pieces, of cloth or paper say" .)