The most common and most likely answer to this crossword clue is the 10 letter word MACEDONIAN
M
A
C
E
D
O
N
I
A
N
More clues leading to the result MACEDONIAN
- Academic Scotsman maybe joining club in European country
- European dominance upset grasping American leader
- European Spice Boys
- European fellow entertaining star, having party somewhere in UK
- Staff includes great lecturer on international language
- Member of European country club accompanying two named men
- Balkan club with Donald and Ian
Buddy explains!

The straight part
We know that "European" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case european = macedonian.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.