Largest of the Ryukyu Islands (7)
I believe the answer is:
okinawa
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">largest of the ryukyu islands</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 okinawa that I've seen before include "Japanese location" , "American victory, June 1945" , "Region of southern Japan, scene of fierce fighting in 1945" , "battle!" , "Japanese island captured by US in June nineteen forty five" .)