What is the answer to "Theory, after being proven" in the WSJ Crossword?

The answer to the WSJ Crossword clue "Theory, after being proven" is LAW (3 letters).

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WSJ

Theory, after being proven WSJ Crossword Clue

Across clue · from the May 8, 2026 puzzle

Stuck on “Theory, after being proven” from the Wall Street Journal Crossword? Here is the verified answer:

Answer

LAW

3 letters · Across · last seen May 8, 2026

1DLetterhead topper4 10DGossip, in modern lingo3 11DProminent instrument in “House of the Rising Sun”5 12DMight5 13DLast word of “Oh! Susanna”4 14AFlamenco cry3 15ABirthplace of Malcolm X5 16ALong-necked wader5 17ARightmost pedal3 18ANot in the top tier11 19D“Stay” singer Lisa4