Vegas casino with a musical name (4)
I believe the answer is:
aria
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vegas casino with a musical name</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 aria that I've seen before include "Musical performance" , "Song for solo voice from an oratorio, cantata etc" , "Type of song" , "Operatic number" , "Operatic song" .)