Stag typically means a male deer, specifically an adult male deer with antlers. In this context, "Without a plus-one, say," refers to attending an event or gathering without a date or partner. It often suggests going solo or without a companion.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Four- or six-pointer, say. Explanations are generated by AI and may be inaccurate.