Siamese (4)
I believe the answer is:
thai
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">siamese</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that siamese can be written as Thai)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for thai that I've seen before include "Native of Bangkok, say" , "eastern language" , "Indo-Chinese language" , "A hit (anag)" , "countryman" .)