State of Australia (8)
I believe the answer is:
tasmania
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">state of australia</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tasmania that I've seen before include "somewhere in Antipodes?" , "Australian island to south of Bass Strait" , "What a relief!" , "Island state off SE Australia, capital Hobart" , "Antipodean island state" .)