Corn (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">corn</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 grain that I've seen before include "eg Barley" , "Cereals" , "Pattern of lines in wood" , "Enter into combat with" , "Cereal crops" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">corn</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that corn can be written as maize)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for maize that I've seen before include "one could make a meal of it" , "Indian corn" , "Corn cob" , "Cereal grass producing corncobs" , "grain crop" .)