Capital head regularly censored best-selling single (5)

I believe the answer is:

hanoi

'capital' is the definition.
(capital of Vietnam)

'head regularly censored best-selling single' is the wordplay.
'regularly censored' indicates alternate letters.
'best-selling single' becomes 'noi' (resembles No 1).
The alternating letters of 'head' are 'ha'.
'ha'+'noi'='HANOI'

(Other definitions for hanoi that I've seen before include "Capital city of Vietnam" , "Vietnamese city" , "Asian capital on the Red River" , "capital out East" , "Vietnamese capital" .)

I've seen this clue in The Times.

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