Former name of Ho Chi Minh City (6)
I believe the answer is:
saigon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">former name of ho chi minh city</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for saigon that I've seen before include "Former name of Ho Chi Minh City" , "See 8" , "city in Asia" , "Former South Vietnamese capital" , "Musical set in Vietnam war - ''Miss . . . . . .''" .)