Some reproductive cells (3)
I believe the answer is:
ova
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">some reproductive cells</span>' is the definition.<br/ ><span class="explanation-format__explanation">(ovum is a kind of reproductive cell)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ova that I've seen before include "Eggs; sounds like above" , "Female reproductive cells" , "Likely end for Russian Fed cup players" , "Female gametes" , "Prerequisite for procreation" .)