Citizen Kane's estate (6)
I believe the answer is:
xanadu
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">citizen kane's estate</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 xanadu that I've seen before include "Where Kublai Khan built his pleasure-dome" , "Coleridge's site of Kubla Khan's pleasure-dome" , "Winter palace of the Kubla Khan, according to Coleridge" , "perfect location" , "Kubla Khan's pleasure dome site (Coleridge)" .)