European sewer rent arrangement (9)
I believe the answer is:
westerner
'european' is the definition.
(I've seen this before)
'sewer rent arrangement' is the wordplay.
'arrangement' is an anagram indicator.
'sewer'+'rent'='sewerrent'
'sewerrent' is an anagram of 'WESTERNER'.
(Other definitions for westerner that I've seen before include "Native" , "One from San Francisco, say" , "Frenchman compared to Thai, say" , "One from certain quarter" , "one from wild country?" .)