European, this writer, with different sales complaint (6,7)
I believe the answer is:
german measles
'complaint' is the definition.
(German measles is an example)
'european this writer with different sales' is the wordplay.
'european' becomes 'german' (Germany is in Europe).
'this writer' becomes 'me' (the person who is writing these clues).
'with' says to put letters next to each other.
'different' indicates anagramming the letters.
'sales' anagrammed gives 'asles'.
'german'+'me'+'asles'='GERMAN MEASLES'
(Other definitions for german measles that I've seen before include "Rubella" , "viral illness" , "complaint" .)