The most common and most likely answer to this crossword clue is the 6 letter word SCARES
I've seen this crossword clue in Financial Times
S
C
A
R
E
S
More clues leading to the result SCARES
Buddy explains!
The straight part
We know that "spooks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case spooks = scares.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 SCARES mean?
SCARES noun- A minor fright.
- A cause of slight terror; something that inspires fear or dread.
- A device or object used to frighten.