"Arty" refers to something or someone that is associated with or characterized by a pretentious or affected artistic style or manner. It typically describes someone who is seen as overly concerned with expressing their creativity in a way that may come across as exaggerated or self-conscious.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: La-di-da. Explanations are generated by AI and may be inaccurate.