Ordering girl a bun, a European (9)
I believe the answer is:
bulgarian
'european' is the definition.
(I know that Bulgarian is a type of european)
'ordering girl a bun a' is the wordplay.
'ordering' indicates an anagram.
'girl'+'a'+'bun'+'a'='girlabuna'
'girlabuna' is an anagram of 'BULGARIAN'.
(Other definitions for bulgarian that I've seen before include "language" , "Native of Sofia" .)