The most common and most likely answer to this crossword clue is the 6 letter word CZECHS
I've seen this crossword clue in The Guardian
C
Z
E
C
H
S
More clues leading to the result CZECHS
- Controls, we hear, for some Europeans
- Declared source of funding for EU members
- Europeans reporting money orders
- … reportedly arrests Europeans
- Citizens of a republic making threats to king audibly
- Say, Europeans are often cozy, reportedly easy and silently retiring
- State arrests some Europeans
- Vocally halts some Europeans
- Oral examinations for some Prague residents
Buddy explains!
The straight part
We know that "EU members" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case eu members = czechs.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.