Apple tree! (3)
I believe the answer is:
oak
I believe this is a double definition.
'apple' is the first definition.
(thesaurus)
'tree' is the second definition.
(oak is a type of tree)
(Other definitions for oak that I've seen before include "Nose of certain wines" , "From little acorns does it grow" , "Traditional British tree" , "Grown acorn" , "Acorns are its fruit" .)