Golden Triangle country (4)
I believe the answer is:
laos
'golden triangle country' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for laos that I've seen before include "SE Asian country" , "Country of Indo-China, capital Vientiane" , "Mountainous state in southeastern Asia" , "Indo-Chinese country" , "Republic in southeastern Asia" .)