or mas·ter stroke
Examples from the Web for master-stroke
But I conclude it with one master-stroke of eulogy—He was the opposite of these men.It Is Never Too Late to Mend|Charles Reade
But if he intended the speech to be hailed as a master-stroke of wit, he signally failed, for nobody laughed.The Tenant of Wildfell Hall|Anne Bronte
The building of Alexandria must be held the master-stroke of policy by which Egypt was kept in obedience.
This last phrase, accompanied by a significant sigh, was a master-stroke.The Physiology of Marriage, Complete|Honore de Balzac
The use of the Latin in the services and administration of the Roman Church is a master-stroke of political genius.Constantinople painted by Warwick Goble|Alexander Van Millingen