Vietnamese capital (5)
I believe the answer is:
hanoi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vietnamese capital</span>' is the definition.<br/ ><span class="explanation-format__explanation">(capital of Vietnam)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for hanoi that I've seen before include "foreign city" , "Vietnamese city" , "Capital city of Vietnam" , "Asian capital on the Red River" , "Asian city" .)