The Silver State, capital Carson City (6)
I believe the answer is:
nevada
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">the silver state</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">capital carson city</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that Nevada has the capital city Carson City)</span><br/ ><br/ ></span>
(Other definitions for nevada that I've seen before include "Arid US state" , "Sagebrush State" , "South-west US state" , "US state, capital Carson City" , "State including Las Vegas" .)