Waits on

SERVES

Attends to others’ needs, often in a restaurant or at a match.

"Waits on" is a straightforward clue where the answer is a verb meaning to attend to someone, like a server in a restaurant. The word "serves" fits because it directly describes the action of waiting on customers or providing assistance. There’s no hidden wordplay here—it’s a simple definition clue where the answer matches the meaning of the phrase.