Cornstalk yield (3)
I believe the answer is:
ear
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cornstalk yield</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 ear that I've seen before include "Organ involved with balance" , "Listener in the cornfield" , "Shell-like (slang)" , "Auditory organ" , "'Give every man thine ..., but few thy voice'/Hamlet" .)