Don's fine port? (6)
I believe the answer is:
rostov
This clue might be a double definition.
'don's fine' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'port?' is the second definition.
(I know that Rostov is a port)
Can you help me to learn more?
(Other definitions for rostov that I've seen before include "on Don in Russia!" , "Russian city" , "Count" .)