Descent from ancestors (7)
I believe the answer is:
lineage
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">descent from ancestors</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for lineage that I've seen before include "Family descent" , "Ancestry, sequence of descendants" , "Line of descendants of an ancestor" , "Genealogy" , "Pedigree, family tree" .)