The most common and most likely answer to this crossword clue is the 10 letter word OBSESSIONS
I've seen this crossword clue in The Guardian
O
B
S
E
S
S
I
O
N
S
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 OBSESSIONS mean?
OBSESSIONS noun- A compulsive or irrational preoccupation.
- An unhealthy fixation.
- Influence or control by evil spirits without possession.