Official paper (8)
I believe the answer is:
document
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">official 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 document that I've seen before include "Paper, form" , "Piece of writing, of an official nature perhaps" , "Paper, record" , "Official paper" , "Piece of written matter" .)