Its capital is Vientiane (4)

I believe the answer is:

laos

'its capital is vientiane' 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 "Country between Thailand/Vietnam" , "Country of Indo-China, capital Vientiane" , "Indo-Chinese country" , "Republic of southeast Asia" , "Landlocked state in southeastern Asia" .)

I've seen this clue in The Wall Street Journal, The Guardian and The New York Times.

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