US “Bluegrass” state (8)
I believe the answer is:
kentucky
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">us bluegrass 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 kentucky that I've seen before include "American state" , "Bluegrass State, famous for breeding horses" , "US state, capital Frankfort" , "US state with an annual Derby race since 1875" , "In USA it is know as the Bluegrass State" .)