Part of the Malay Archipelago (6)
I believe the answer is:
borneo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">part of the malay archipelago</span>' is the definition.<br/ ><span class="explanation-format__explanation">('Borneo' is part of 'malay archipelago')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for borneo that I've seen before include "Large E. Indies island" , "country" , "Largest island of the Malay archipelago" , "West Pacific island" , "The world's third-largest island" .)