Sri Lanka, once (6)
I believe the answer is:
ceylon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sri lanka once</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 ceylon that I've seen before include "Sri Lanka's former name" , "Former name of Sri Lanka" , "Sri Lanka, formerly" , "Old place" .)