Senior citizen brings tree to isle (8)
I believe the answer is:
alderman
'senior citizen' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'tree to isle' is the wordplay.
'tree' becomes 'alder' (alder tree is a kind of tree).
'to isle' becomes 'man' (Man is an example).
'alder'+'man'='ALDERMAN'
'brings' acts as a link.
Can you help me to learn more?
(Other definitions for alderman that I've seen before include "Local politician" , "Old municipal official" , "superior member of county council" , "Member of an English city council" , "Member of English county council" .)