Thin cookie
I believe the answer is:
wafer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">thin cookie</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for wafer that I've seen before include "Ice cream's biscuit" , "Thin type" , "Light thin biscuit" , "Disc of bread" , "Very thin slice" .)