The proviso scene in "The Way of the World" by William Congreve is a key moment where the character Mirabell obtains a proviso (conditional clause) from Lady Wishfort to secure his marriage to Millamant. This scene showcases the intricate plotting and manipulation that are characteristic of restoration comedy, as Mirabell cleverly navigates the social conventions and relationships of the characters to achieve his goal. It also highlights the themes of power, deception, and wit that are central to the play.