What should the referee do if a player from the winning team engages in time-wasting behavior?

When a player from the winning team engages in time-wasting behavior, the proper course of action is to stop the clock to issue a card. This is because time-wasting can significantly impact the flow and fairness of the game, especially if the action is intended to prevent the opposing team from having a fair chance to equalize or win. By issuing a card, the referee is taking a firm stance against this unsportsmanlike behavior, which serves both to penalize the player for disruptive actions and to deter others from similar infractions. Not addressing the behavior with appropriate disciplinary action undermines the game's integrity and allows teams to exploit such tactics without consequence. Thus, stopping the clock to issue a card reflects the referee's responsibility to maintain fairness and uphold the rules of the game.