The most common and most likely answer to this crossword clue is the 9 letter word RECLINERS
I've seen this crossword clue in The Guardian
R
E
C
L
I
N
E
R
S
More clues leading to the result RECLINERS
Buddy explains!

The straight part
We know that "Chairs" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case chairs = recliners.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 RECLINERS mean?
RECLINERS noun- One who, or that which, reclines.
- A chair hinged so that the back can be reclined for comfort.