Biscuit with ice cream (5)
I believe the answer is:
wafer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">biscuit with ice cream</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 wafer that I've seen before include "Ice cream's biscuit" , "Very thin 14 Down" , "Communion bread" , "Ice-cream biscuit" , "Ice cream biscuit" .)