Target of a 1917 uprising (4)
I believe the answer is:
tsar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">target of a 1917 uprising</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 tsar that I've seen before include "One associated with 26 [KREMLIN]" , "Alexander and Nicholas held this title in Russia" , "Title of Russian emperor" , "Supreme authority" , "Peter the Great, for example" .)