Bush Senior (5)
I believe the answer is:
elder
I believe this clue is a double definition.
'bush' is the first definition.
(elder is a kind of bush)
'senior' is the second definition.
(similar in meaning)
(Other definitions for elder that I've seen before include "First-born" , "one with roots" , "Tribal advisor" , "Tree - wise counsellor" , "Ancestor" .)