It might be blown in the fourth quarter

WHISTLE

Think of what a referee uses to signal the end of a game or a foul—it’s often heard loud and clear during crucial moments.

This clue plays on two meanings of "blown." In sports like football or basketball, a referee's whistle is literally blown to signal the end of a game, especially in the fourth quarter. The word "blown" also hints at the sound the whistle makes—so the answer ties the action (blowing) to the object (whistle) in a clever way.