Communist state (4)

I believe the answer is:
ussr
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">communist state</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that USSR is a communist state)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ussr that I've seen before include "Former union of socialist republics" , "The Beatles? song 'Back in the . . . .'" , "Former federation of Russial and other states" , "Country established in 1922 and dissolved in 1991, in short" , "Former Soviet Union" .)