Bay or may? (4)
I believe the answer is:
tree
This clue is a double definition.
'bay' is the first definition.
(thesaurus)
'may?' is the second definition.
(I've seen this before)
(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" .)