Former name of Ho Chi Minh City (6)
I believe the answer is:
saigon
'former name of ho chi minh city' is the definition.
(I've seen this before)
This is the entire clue.
(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 . . . . . .''" .)