The most common and most likely answer to this crossword clue is the 7 letter word AIRSIDE
I've seen this crossword clue in Independent
A
I
R
S
I
D
E
More clues leading to the result AIRSIDE
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.
What does AIRSIDE mean?
AIRSIDE adjective- In a passenger-only area of an airport (beyond passport and customs control)
- Into the passenger-only area of an airport (beyond passport and customs control)