Palm or pine (4)
I believe the answer is:
I believe this clue is a double definition.
'palm' is the first definition.
(thesaurus)
'pine' is the second definition.
(thesaurus)
(Other definitions for tree that I've seen before include "Stand for mugs" , "Chestnut or elm?" , "Oak, say" , "Plane or pine, for example?" , "Elm, perhaps" .)