The most common and most likely answer to this crossword clue is the 8 letter word STAPLERS
I've seen this crossword clue in Financial Times
S
T
A
P
L
E
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S
More clues leading to the result STAPLERS
Buddy explains!

The straight part
We know that "stationery items" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stationery items = staplers.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 STAPLERS mean?
STAPLERS noun- A device which binds together sheets of paper by driving a thin metal staple through the sheets and simultaneously folding over the ends of the staple against the back surface of the paper.
- A dealer in staple goods.
- One employed to sort wool according to its staple.