Not expert, the Maori follows a lot of doctors to the old city (7)
I believe the answer is:
amateur
'not expert' is the definition.
(I've seen this before)
'the maori follows a lot of doctors to the old city' is the wordplay.
'the maori' becomes 'te' (I've seen this in other clues).
'follows' is a charade indicator (letters next to each other).
'a lot of doctors' becomes 'ama' (I can't explain this - if you can you should believe this answer much more).
'to the old city' becomes 'ur' (ancient city state).
'te' after 'ama' is 'amate'.
'amate'+'ur'='AMATEUR'
Can you help me to learn more?
(Other definitions for amateur that I've seen before include "refusing payment" , "Lay person" , "Inept, non-professional" , "Layman" , "Of sportsman, not professional" .)