Smooching on a park bench, e.g., for short

PDA

Think of the three-letter abbreviation for displays of affection that might draw side-eye in public, like holding hands or a quick kiss. It’s often mentioned in discussions about workplace or school behavior policies.

This clue describes a couple kissing in public, which is a common example of "public displays of affection." The phrase "for short" signals that the answer is an abbreviation, so instead of spelling out the full term, you use its initials: PDA. It’s a playful way to hint at something many people recognize but might not immediately think of in crossword terms.