The most common and most likely answer to this crossword clue is the 8 letter word ARMRESTS
I've seen this crossword clue in The Daily Telegraph
A
R
M
R
E
S
T
S
More clues leading to the result ARMRESTS
- Mark is running in trousers: they won’t support his legs
- Relax amid weapons that may be dropped between seats
- Supports for Members?
- Detains about a thousand supporters
- Member supports constituents in comfortable seat
- Checks about 1000 supports
- Parts of chair found in an empty room's excess
- 1000 in checks for some supporters
- Stops embracing married pair on a sofa
- Male entering nicks parts for furniture
Buddy explains!

The straight part
We know that "parts for furniture" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case parts for furniture = armrests.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 ARMRESTS mean?
ARMRESTS noun- Part of the seat of a chair that is designed to support the arm.