The most common and most likely answer to this crossword clue is the 4 plus 4 letter word EXIT VISA
I've seen this crossword clue in The Guardian
E
X
I
T
V
I
S
A
More clues leading to the result EXIT VISA
Buddy explains!

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.