Answer: RIFFED

Riffed refers to the act of playing or performing an improvised musical phrase or passage, typically on a musical instrument such as a guitar or piano. It involves creating a repeating pattern or melody that is catchy and serves as a main theme or foundation for a song.

Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Improvised musically. Explanations are generated by AI and may be inaccurate.