Sam leaves modern Athens unofficially crowned (9)
I believe the answer is:
enthroned
'crowned' is the definition.
The definition and answer can be both to do with social activities as well as being past participle verbs.
Maybe there's a link between them I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for enthroned that I've seen before include "Put in place" , "Made bishop" , "Honourably placed" , "Installed (as monarch)" .)