Winter Palace resident (4)
I believe the answer is:
czar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">winter palace resident</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 czar that I've seen before include "Russian ruler (alt. but not rare spelling)" , "Russian emperor" , "person of great power" , "Despot" , "Pre-1917 Russian ruler" .)