Soviet dictator (6)
I believe the answer is:
stalin
'soviet dictator' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stalin that I've seen before include "Infamous Russian leader" , "Russian tyrant" , "Russian WW2 dictator" , "Tyrant - last in (anag)" , "Tyrannical dictator among Latins" .)