The most common and most likely answer to this crossword clue is the 3 letter word NOH
I've seen this crossword clue in The Times
N
O
H
More clues leading to the result NOH
- Play character in first book, missing third
- Form of 24 a Mitford aristocrat backed?
- Transporter of livestock avoiding a drama
- Reportedly be familiar with Japanese drama
- Feature of cockney speech in drama
- Theatrical presentation of “Hamlet” as announced in the East End?
- Name old hospital drama
- Traditional drama is grind devoid of energy? The reverse
- Quite a lot of blood in new hospital drama
- Name O. Henry originally adopted for theatrical work
Buddy explains!

The straight part
We know that "Form of 24" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case form of 24 = noh.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 NOH mean?
NOH noun- A form of classical Japanese music drama.