Egg cells (3)
I believe the answer is:
ova
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">egg cells</span>' is the definition.<br/ ><span class="explanation-format__explanation">('ovum' can be a synonym of 'egg cell')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ova that I've seen before include "Release of women" , "Female gametes" , "Eggs; sounds like above" , "Female reproductive cells" , "Potential life sources" .)