Red Square honoree (5)
I believe the answer is:
lenin
'red square honoree' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lenin that I've seen before include "Head of the Communist state after the fall of the Tsar" , "Vladimir Ilyich Ulyanov, d. 1924" , "First leader of USSR" , "Leader of the Russian Revolution" , "V. I. -, Soviet politician and revolutionary" .)