The most common and most likely answer to this crossword clue is the 9 letter word ORIENTALS
I've seen this crossword clue in The Times
O
R
I
E
N
T
A
L
S
More clues leading to the result ORIENTALS
Buddy explains!

The straight part
We know that "Cats" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cats = orientals.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 ORIENTALS mean?
ORIENTALS noun- A precious stone, especially an orient pearl.
- A member or descendant of the peoples and cultures of the Orient.
- A lily cultivar of a widely varied group, with strong scent.
- A person from the eastern region of a place.