Large US state (5)
I believe the answer is:
texas
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large us state</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 texas that I've seen before include "Lone-Star state" , "American state, capital Austin" , "11's favourite baseball team" , "State of USA" , "America's Lone Star State" .)