Chinese switch positions in capital (5)
I believe the answer is:
hanoi
'capital' is the definition.
(capital of Vietnam)
'chinese switch positions' is the wordplay.
'chinese' becomes 'han' (Chinese dynasty).
'switch positions' becomes 'OI' (O and I represent off and on switches).
'han'+'oi'='HANOI'
'in' acts as a link.
(Other definitions for hanoi that I've seen before include "foreign city" , "Vietnamese city" , "Capital city of Vietnam" , "Asian capital on the Red River" , "Vietnamese capital" .)