Tree; beat (5)
I believe the answer is:
birch
I believe this is a double definition.
'tree' is the first definition.
(birch tree is a kind of tree)
'beat' is the second definition.
(thesaurus)
(Other definitions for birch that I've seen before include "Wood" , "Flog" , "Tree bearing catkins" , "Tree with silvery bark" , "Flogging rod" .)