Crossword clue: Late-night party people?

The answer "COPS" fits the clue "Late-night party people" because police officers often work during the late hours, especially on weekends when parties are common. They are the ones who ensure safety and manage any disturbances that might happen at these gatherings. So, in a way, they are present at late-night parties, making sure everything stays under control. This playful twist on the term "party people" makes the answer clever and fitting.