Bay or may? (4)
I believe the answer is:
tree
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">bay</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">may?</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for tree that I've seen before include "Forest plant" , "Root-and-branch plant?" , "cross" , "''I think that I shall never see / A poem lovely as a ...'' (Kilmer)" , "Plant with bark" .)