Great Britain (6,7)
I believe the answer is:
united kingdom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">great britain</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for united kingdom that I've seen before include "UK, expanded" , "Where you may well be" , "Great Britain and Northern Ireland" , "Our island nation" , "England, Scotland, Wales and Northern Ireland" .)