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Totally foolproof NYT Crossword Clue

Down clue · from the February 21, 2026 puzzle

Stuck on “Totally foolproof” from the New York Times Crossword? Here is the verified answer:

Answer
IRONCLAD
8 letters · Down · last seen February 21, 2026

More clues from the February 21, 2026 puzzle

1A Look to give nothing away? 10 1D Smoking spot 6 2D Mrs. John Quincy Adams 6 3D Campaign leader, informally 6 4D Overseer of the Erie Canal, in brief 3 5D "Star Trek" villain played by Ricardo Montalbán 4 6D Some diner drinks 5 7D They might have all the answers 10 8D Pink-furred cat in "Garfield" 6 9D With 26-Down, basic instruction to a dog 4 10D New ___ (official cap maker for M.L.B.) 3 11A European city on the Bay of Angels 4