Answer: NAFTA

NAFTA, or the North American Free Trade Agreement, is an international trade agreement between the United States, Canada, and Mexico. It was established in 1994 to promote economic cooperation and free trade among the three countries. However, in 2020, NAFTA was replaced by a new agreement called the United States-Mexico-Canada Agreement (USMCA). The USMCA made certain revisions and updates to the original NAFTA agreement.

Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Can./U.S./Mex. treaty. Explanations are generated by AI and may be inaccurate.