The most common and most likely answer to this crossword clue is the 9 letter word CORRIDORS
I've seen this crossword clue in The Guardian
C
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More clues leading to the result CORRIDORS
Buddy explains!
The straight part
We know that "aisles" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case aisles = corridors.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 CORRIDORS mean?
CORRIDORS noun- A narrow hall or passage with rooms leading off it, as in a building or in a railway carriage.
- A restricted tract of land that allows passage between two places.
- The covered way lying round the whole compass of the fortifications of a place.
- Airspace restricted for the passage of aircraft.