Former kingdom and French protectorate of E Indochina now part of Vietnam (5)

I believe the answer is:

annam

(Other definitions for annam that I've seen before include "Asian region" , "Former SE Asia country" , "former French protectorate" , "part of Vietnam" , "Central Vietnam, ma, nan (anag.)" .)

I've seen this clue in The Mirror.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.