Pasternak or Yeltsin (5)
I believe the answer is:
boris
I believe this clue is a double definition.
'pasternak' is the first definition.
(I've seen this in another clue)
'yeltsin' is the second definition.
(as in Russian politician Boris Yeltsin)
(Other definitions for boris that I've seen before include "Russian name" , "- Godunov, Mussorgsky opera" , "- Johnson, Mayor of London" , "- Godunov, Russian tsar" , "Pasternak, perhaps" .)