The most common and most likely answer to this crossword clue is the 4 letter word CUSS
I've seen this crossword clue in The Times
C
U
S
S
More clues leading to the result CUSS
- Revile harmful gas American imported
- Obstinate person taking courses at regular intervals
- Stubborn person at heart, guessing copper will take the lead
- Swear copper succeeded framing son
- Swear in the middle of discussion
- A curse of frequent cruises
- Stubborn type in middle of discussion
- Swear in debate there’s no hell
Buddy explains!

The straight part
We know that "Revile" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case revile = cuss.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 CUSS mean?
CUSS noun- A curse.
- A curse word.
- To use cursing, to use bad language, to speak profanely.
- A fellow, person.