Dweller along the Mekong (7)
I believe the answer is:
laotian
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dweller along the mekong</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for laotian that I've seen before include "Citizen of Vientiane, for example" , "Thai neighbour" , "Person from southeast Asian country" , "language out East" , "Oriental" .)