It's still produced in Russia (5)
I believe the answer is:
vodka
'russia' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for vodka that I've seen before include "shot?" , "Distilled spirit" , "Russian "little water"" , "Originally Russian spirit" , "Strong drink" .)