Major Tree (5)
I believe the answer is:
elder
I believe this clue is a double definition.
'major' is the first definition.
(thesaurus)
'tree' is the second definition.
(elder is a kind of tree)
(Other definitions for elder that I've seen before include "Older or two" , "Official of some Churches, or senior statesman" , "Church official; tree" , "Senior figure; tree" , "Woody shrub - used for wine, tea or cordial" .)