“"The kissing disease"” crossword clue

Reveal the answer to see why it works and where this clue has appeared before.MONO is the answer to the New York Times crossword clue “"The kissing disease"”. It was last seen in the puzzle of December 22, 2025, where it runs at 26 Down 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. This exact clue has run 2 times in NYT puzzles, first on December 22, 2025.