The most common and most likely answer to this crossword clue is the 6 letter word CENSOR
I've seen this crossword clue in The Guardian
C
E
N
S
O
R
More clues leading to the result CENSOR
- Cut sound made by detector
- Crone’s miscast as protector of public morals
- Ban disorderly crones
- One who cuts corners – only one right turn
- One writing in 24 down note in jazzy score
- To cut corners carelessly’s right out
- Some Saracens ordered a Roman magistrate
- Church poles attached to gold banner?
- Clean up device that detects signals audibly
- Magistrate’s expression of surprise being put inside
Buddy explains!

The straight part
We know that "One writing in 24 down/One writing in 24 down" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one writing in 24 down/one writing in 24 down = censor.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 CENSOR mean?
CENSOR noun- One of the two magistrates who originally administered the census of citizens, and by Classical times (between the 8th century B.C.E. and the 6th century C.E.) was a high judge of public behaviour and morality.
- An official responsible for the removal or suppression of objectionable material (for example, if obscene or likely to incite violence) or sensitive content in books, films, correspondence, and other media.
- A college or university official whose duties vary depending on the institution.
- One who censures or condemns.
- To review for, and if necessary to remove or suppress, content from books, films, correspondence, and other media which is regarded as objectionable (for example, obscene, likely to incite violence, or sensitive).
- A hypothetical subconscious agency which filters unacceptable thought before it reaches the conscious mind.