Early stage of life (6)
I believe the answer is:
embryo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">early stage of life</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 embryo that I've seen before include "Early life form" , "It's potential to grow" , "Unborn offspring in the process of development" , "Fertilised human egg" , "Stage in development of unborn child" .)