Cereal topper (6)
I believe the answer is:
banana
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cereal topper</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for banana that I've seen before include "Tropical yellow fruit" , "Fruit with soft, sweet flesh" , "that may be unzipped" , "Another of 5 down" , "Plantain-like fruit" .)