Bird that lays the largest egg (7)
I believe the answer is:
ostrich
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bird that lays the largest egg</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ostrich that I've seen before include "The head-in-the-sand bird" , "Denier" , "non-flyer?" , "Bird burying its head in the sand" , "The biggest bird, can't fly" .)