Cinema snack (7)
I believe the answer is:
popcorn
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cinema snack</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 popcorn that I've seen before include "Stuff to eat at the cinema" , "Popular cinema food" , "flicks food" , "making a meal of it?" , "Kernels exploded by heat" .)