The most common and most likely answer to this crossword clue is the 4 letter word FOXY
I've seen this crossword clue in Independent
F
O
X
Y
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 FOXY mean?
FOXY adjective- Having the qualities of a fox.
- Cunning, sly.
- Attractive, sexy (of a woman).
- (of a person, especially a woman) Reddish-brown haired.
- Using too much of the reddish-brown colours.
- (of wine) Having an animal-like odour.