Russian beer half-a-dozen go back for (6)
I believe the answer is:
alexis
'russian' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?
'beer half-a-dozen go back for' is the wordplay.
'beer' becomes 'alegar' (I have seen 'Sour beer' mean 'alegar' so perhaps 'beer' could also mean 'alegar').
'half' suggests halving the letters.
'a dozen go back for' becomes 'xis' (I can't explain this - if you can you should believe this answer much more).
'alegar' halved is 'ale'.
'ale'+'xis'='ALEXIS'
Can you help me to learn more?
(Other definitions for alexis that I've seen before include "man or woman" , "Lia's ex has another name" .)