The most common and most likely answer to this crossword clue is the 4 letter word SEXY
I've seen this crossword clue in Financial Times
S
E
X
Y
More clues leading to the result SEXY
- Hot edges of stone axes
- Reverse of sure about kiss? Certainly not
- Edges in shade, axes getting hot
- Inviting severely disheartened divorcee to enter
- Soviet leader on former Axis: “It’s hot”
- Sensual and extremely seductive kiss unmanned many
- What Molly Bloom said about snatching kiss is erotic
- Hot kiss granted when standing outside
- Erotic reply to proposal put up, a case for a kiss
- Desirable limits of Spitfire plane’s coordinates?
Buddy explains!

The straight part
We know that "hot" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hot = sexy.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 SEXY mean?
SEXY adjective- (of a person) Having sex appeal; suggestive of sex.
- That can sexually attract or arouse.
- (of a thing or concept) interesting, attractive, intriguing, or appealing.
- Sexual.
- Used to describe prime numbers that differ from each other by six.