Continuance (8)
I believe the answer is:
survival
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">continuance</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that survival is a type of continuance)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for survival that I've seen before include "Natural selection is the ... of the fittest" , "Something continuing to exist from an earlier period" , "Continued existence" , "Relic from former times" , "State of remaining alive" .)