With 10-Across, alternative to a fist bump

HIGH

Think of a friendly gesture where your palm meets someone else’s above shoulder level, often seen in celebrations or greetings. The first half of the phrase starts with this word.

This clue is part of a two-part answer where "HIGH" combines with 10-Across (likely "FIVE") to form "HIGH FIVE," a common greeting alternative to a fist bump. The wordplay splits the familiar phrase into two separate clues, with this one hinting at the first half. It relies on the solver recognizing that "HIGH" alone doesn’t make sense without its pair, nudging them to think of the full gesture.