A breakfast food (6)
I believe the answer is:
muesli
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a breakfast food</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that muesli is a type of breakfast food)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for muesli that I've seen before include "Swiss cereal" , "Breakfast dish with cereals, nuts, fruit etc" , "Breakfast food of cereals, fruits, nuts etc" , "Mixture of cereals etc" , "Rolled oats, nuts and fruit mixture" .)