“"There is nothing on earth so powerful as an ___ whose time has come" (proverb)” crossword clue

Reveal the answer to see why it works and where this clue has appeared before.IDEA is the answer to the New York Times crossword clue “"There is nothing on earth so powerful as an ___ whose time has come" (proverb)”. It was last seen in the puzzle of July 2, 2026, where it runs at 15 Across and fills 4 squares. It crosses 4 other entries in that grid — those are listed below and are the quickest way to confirm the letters you already have.