Eg, rye (6)
I believe the answer is:
cereal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">eg rye</span>' is the definition.<br/ ><span class="explanation-format__explanation">(rye is a kind of cereal)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cereal that I've seen before include "Grass cultivated for food" , "Breakfast food made from grain" , "Rye, for example" , "Maize, rye or the like" , "Breakfast dish" .)