Former name of Thailand (4)
I believe the answer is:
siam
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">former name of thailand</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 siam that I've seen before include "Old Thailand" , "An old country" , "old-style country" , "Thailand's former name" , "Thailand, formerly" .)