As Burns said: no curtsies for wealthy Europeans (6)
I believe the answer is:
nabobs
'as burns said' is the definition.
I can't tell whether this defines the answer.
'no curtsies for wealthy europeans' is the wordplay.
'no' becomes 'n' (common abbreviation y/n).
'curtsies' becomes 'bobs' ('bob' can be a synonym of 'curtsy').
'for' says to put letters next to each other (I've seen this in other clues).
'wealthy europeans' becomes 'a' (I am not sure about this - if you are sure you should believe this answer much more).
'bobs' put after 'a' is 'abobs'.
'n'+'abobs'='NABOBS'
Can you help me to learn more?
(Other definitions for nabobs that I've seen before include "Officials of Mogul empire, or just wealthy people" , "Governors under the Mogul empire in India" .)