Tree from Mediterranean island, I’m told (7)
I believe the answer is:
cypress
'tree' is the definition.
(cypress is a kind of tree)
'mediterranean island i'm told' is the wordplay.
'mediterranean island' becomes 'cyprus' (I've seen this before).
'i'm told' shows a homophone (sound like).
'cyprus' sounds like 'CYPRESS'.
'from' is the link.
(Other definitions for cypress that I've seen before include "Wood" , "Evergreen tree" , "Evergreen conifer" , "Evergreen, mourning symbol" , "Tree with funereal associations" .)