Elder; first (6)
I believe the answer is:
senior
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">elder</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >'<span class="explanation-format__original">first</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for senior that I've seen before include "Superior - elder" , "Elder (of two)" , "Older in years or higher in rank" , "Elder person - higher in rank" , "High in rank" .)