Tree; beat (5)
I believe the answer is:
birch
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">tree</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(birch tree is a kind of tree)</span><br/ ><br/ >'<span class="explanation-format__original">beat</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for birch that I've seen before include "Wood" , "Flog" , "Tree bearing catkins" , "Tree with silvery bark" , "Flogging rod" .)