Zsa Zsa's sister (3)
I believe the answer is:
eva
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">zsa zsa's sister</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 eva that I've seen before include "-- Peron, Argentinian First Lady" , "Maria -- Duarte De Peron" , "Girl's name; space walk" , "girl appears" , "Girl's name; extravehicular activity (abbreviation)" .)