Noah went round to one capital place (5)

I believe the answer is:

hanoi

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'capital place' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'noah went round to one' is the wordplay.
'went round' indicates an anagram (I've seen 'going round' mean this).
'to one' becomes 'i' (Roman numeral).
'noah' anagrammed gives 'hano'.
'hano'+'i'='HANOI'

Can you help me to learn more?

(Other definitions for hanoi that I've seen before include "Asian city" , "foreign city" , "Vietnamese capital" , "Vietnamese city" , "capital out East" .)

I've seen this clue in The Globe and Mail.

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