The most common and most likely answer to this crossword clue is the 8 letter word SPANNERS
I've seen this crossword clue in Financial Times
S
P
A
N
N
E
R
S
More clues leading to the result SPANNERS
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 SPANNERS mean?
SPANNERS noun- A hand tool for adjusting nuts and bolts; a wrench.
- One who, or that which, spans.
- A hand tool shaped like a small crank handle, for winding the spring of a wheel lock on a musket.
- A device in early steam engines for moving the valves for the alternate admission and shutting off of the steam.
- A problem, dilemma or obstacle; something unexpected or troublesome (in the phrase spanner in the works)
- (mildly) A stupid or unintelligent person; one prone to making mistakes, especially in language.