Where Vietnamese capitalists are concentrated? (5)
I believe the answer is:
hanoi
'where vietnamese capitalists are concentrated?' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
This is all the clue.
Can you help me to learn more?
(Other definitions for hanoi that I've seen before include "Vietnamese city" , "capital out East" , "foreign city" , "Asian capital on the Red River" , "Vietnamese capital" .)