Sycamore or maple (4)
I believe the answer is:
tree
This clue is a double definition.
'sycamore' is the first definition.
(thesaurus)
'maple' is the second definition.
(maple is a type of tree)
(Other definitions for tree that I've seen before include "eg Box" , "May" , "Box or bay maybe?" , "eg Ash, oak" , "Plant with a main trunk and branches" .)