The most common and most likely answer to this crossword clue is the 8 letter word CORRIDOR
I've seen this crossword clue in The Times
C
O
R
R
I
D
O
R
More clues leading to the result CORRIDOR
- Men must follow my clear path
- Very unpleasant losing hours in cold or long passage
- My soldiers must restrict free passage
- Endless bullfight or passage
- Passage from never-ending TV soap about bar
- Crumbs cleared by old cleaner finally in passage
- Wow, other ranks will eat free in hall
- A hundred men on both sides of free territorial strip
- Blimey! Free gold in passage
- . After college, two choices which allow free passage
Buddy explains!

The straight part
We know that "passage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case passage = corridor.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 CORRIDOR mean?
CORRIDOR 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.