European cooked rancid eel (9)
I believe the answer is:
icelander
'european' is the definition.
(I know that Icelander is a type of european)
'cooked rancid eel' is the wordplay.
'cooked' is an anagram indicator (letters cooked into a new form).
'rancid'+'eel'='rancideel'
'rancideel' with letters rearranged gives 'ICELANDER'.
(Other definitions for icelander that I've seen before include "National" , "Eg a person from Reykjavik" , "Reykjavik native?" , "Northern European" , "Foreigner" .)