Puts icing on

FROSTS

Think of what a baker does to a cake before adding sprinkles.

"Puts icing on" directly hints at the action of covering something with frosting, which is what "frosts" means. The word plays on the literal sense of applying icing (like on a cake) while also nodding to the verb form of "frost," which can mean to coat with a sugary layer. It’s a straightforward clue where the answer matches the action described without any hidden tricks.