The term "letseat" can be understood as a playful combination of the words "let's" and "eat." It is often used informally to suggest or invite someone to have a meal. In the context of the clue "Words after grace, perhaps," it implies that "letseat" could be a phrase or expression commonly used after giving thanks or saying grace before a meal.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: "Mangia!". Explanations are generated by AI and may be inaccurate.