Diva ____ Callas (5)
I believe the answer is:
maria
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">diva callas</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 maria that I've seen before include "Dark planes on the moon; girl's name" , "More than one plain" , "Heroine of West Side Story" , "Black --, police van" , "Italian Mary" .)