Brummie dish with added port (9)
I believe the answer is:
baltimore
'port' is the definition.
(I've seen this before)
'brummie dish with added' is the wordplay.
'brummie dish' becomes 'balti' (I can't explain this - if you can you should give a lot more credence to this answer).
'with' means one lot of letters go next to another.
'added' becomes 'more' (similar in meaning).
'balti'+'more'='BALTIMORE'
Can you help me to learn more?
(Other definitions for baltimore that I've seen before include "City of north Maryland" , "Large city in Maryland" , "US city" , "City north-east of Washington DC" , "Largest city of Maryland, USA" .)