Language closely related to Thai (3)
I believe the answer is:
lao
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">language closely related to thai</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 lao that I've seen before include "Asian" , "Indo-Chinese language" .)