7 Across

NYT Mini • September 19, 2025

___ acid (protein builder)

Answer:

AMINO

Hint:

Think of the essential compounds that form chains to create peptides; their name starts with the same letter as "alpha."

Explanation:

This clue is asking for a type of acid that serves as a building block for proteins. The blank suggests a short word, and "amino acid" fits perfectly—it’s a well-known term in biology for compounds that combine to form proteins. The clue is straightforward with no wordplay, just a direct definition where "protein builder" hints at the role of amino acids in the body.

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General solving tip

Fill-in-the-blank clues want a set phrase or idiom. The crosses usually confirm the exact wording.

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