Restored boat in a city (6)
I believe the answer is:
newark
'a city' is the definition.
(Newark is an example)
'restored boat' is the wordplay.
'restored' becomes 'new' (I can't explain this - if you can you should give a lot more credence to this answer).
'boat' becomes 'ark' (ark is a kind of boat).
'new'+'ark'='NEWARK'
'in' is the link.
Can you help me to learn more?
(Other definitions for newark that I've seen before include "US port" , "east coast port" , "US gateway" , "Notts. town; NJ city" , "Market town on river Trent" .)