European Right working to curb unreasonable desire (8)
I believe the answer is:
romanian
'curb unreasonable desire' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'european right working' is the wordplay.
'european' becomes 'roman' (Roman is an example).
'right working' becomes 'ian' (I can't explain this - if you can you should give a lot more credence to this answer).
'roman'+'ian'='ROMANIAN'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for romanian that I've seen before include "Nationality of citizen of Bucharest" , "One from Bucharest" , "Native to Bucharest, say" , "European" .)