Forebear (8)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">forebear</span>' is the definition.<br/ ><span class="explanation-format__explanation">(a forebear is an ancestor or predecessor)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ancestor that I've seen before include "Old member of the family -no traces (anag)" , "Adam was our first one" , "Predecessor" , "one is up a tree" , "One of one's forebears" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">forebear</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for antecedent that I've seen before include "Something logically preceding another" , "prior" , "Previous" , "Going before (in time/order)" , "Preceding in time or order" .)
(Another definition for primogenitor that I've seen is " Patriarch".)