Nevada's "Biggest Little City in the World" (4)
I believe the answer is:
reno
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nevada's biggest little city in the world</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 reno that I've seen before include "American city" , "gambling centre" , "Nevadan city" , "Nevada city of Nero" , "Nevada gambling resort" .)