Beer brewed in Tibet for the Russian capital (6)
I believe the answer is:
bitter
'beer' is the definition.
(bitter is a type of beer)
'brewed in tibet for the russian capital' is the wordplay.
I cannot quite see how this works, but
an anagram of 'tibet' is 'bitte' which is present in the answer.
A single letter 'r' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bitter that I've seen before include "Hard to accept" , "Sour kind of English ale?" , "Tart or resentful" , "English beer, sounds sour" , "Resentful and cynical" .)