Spirit of Russia (5)
I believe the answer is:
vodka
'spirit of russia' is the definition.
(I've seen this before)
'spirit of' is the wordplay.
I cannot quite understand how this works, but
'spirit' could be 'ka' (I've seen this in other clues) and 'ka' is present in the answer.
'of' could be 'o' and 'o' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for vodka that I've seen before include "Russian tipple" , "Colourless liquor" , "shot?" , "Alcoholic spirit of Russian origin" , "Distilled spirit" .)