Large quantities of paper (5)
I believe the answer is:
reams
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large quantities of paper</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for reams that I've seen before include "Scrapes the barrel" , "This much paperwork" , "a very large amount" , "Large quantities (of paper?)" , "Large quantity of written matter" .)