Its capital is Vientiane (4)
I believe the answer is:
laos
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">its capital is vientiane</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for laos that I've seen before include "Country between Thailand/Vietnam" , "Country of Indo-China, capital Vientiane" , "Indo-Chinese country" , "Republic of southeast Asia" , "Landlocked state in southeastern Asia" .)