Russian spirit (5)
I believe the answer is:
vodka
'russian spirit' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for vodka that I've seen before include "Spirit traditionally made from fermented grains or potatoes" , "Strong drink" , "Distilled spirit" , "Spirit made from rye, wheat or potatoes" , "Booze" .)