Spanish omelette (8)
I believe the answer is:
tortilla
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spanish omelette</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tortilla that I've seen before include "Mexican filled pancake" , "One; military grouping" , "Mexican dish" , "Round flat Mexican cake" , "Mexican snack" .)