49th state (6)
I believe the answer is:
alaska
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">49th state</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 alaska that I've seen before include "Sarah Palin's home state" , "that may be baked? Not by the sun" , "Isolated US state" , "North-western US state" , "Forty-ninth US state" .)