Senior — tree (5)
I believe the answer is:
elder
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">senior</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that senior can be written as elder)</span><br/ ><br/ >'<span class="explanation-format__original">tree</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(elder is a kind of tree)</span><br/ ><br/ ></span>
(Other definitions for elder that I've seen before include "sort of statesman" , "Tree and Mormon church officer" , "Official of some Churches, or senior statesman" , "Senior churchman - shrub" , "Senior tribal figure" .)