Sandwich (6)
I believe the answer is:
sarnie
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sandwich</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 sarnie that I've seen before include "Sandwich (slang)" , "Familiar form of snack" , "Popular bread-based snack (colloq)" , "Sandwich (informal)" , "Bread and filling snack (informal)" .)