21 Down

NYT Daily ? September 20, 2025

B to C, but not A to B

Answer:

SEMITONE

Hint:

This musical interval is the smallest distance between two adjacent notes on a piano, like moving from a white key to the very next black or white key.

Explanation:

This clue plays on musical intervals—the distance between two notes. "A to B" is a whole tone (two semitones), but "B to C" is just a semitone (the smallest step in the standard Western scale). The "but not" hints that the answer is the smaller of the two, so "semitone" fits perfectly.

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General solving tip

When a clue says 'informally,' 'slangily,' or 'casually,' think slang, clipped forms, or texting abbreviations. Try the short casual word you'd use in speech or a message.

More tips → General Hints