Paper handkerchief (6)
I believe the answer is:
tissue
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">paper handkerchief</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 tissue that I've seen before include "See 17" , "Flimsy paper" , "Maybe lies" , "Basic structural element of an animal or plant" , "Paper hankie" .)