The most common and most likely answer to this crossword clue is the 8 letter word RAILINGS
I've seen this crossword clue in Financial Times
R
A
I
L
I
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S
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 RAILINGS mean?
RAILINGS noun- A fence or barrier consisting of one or more horizontal rails and vertical supports.
- Railing (a horizontal rail with vertical supports)