LinkedIn Pinpoint

Here is how each clue relates to that word:
Class: "Master class" is a special class taught by an expert.
Mind: "Mastermind" means to be the person who plans and directs a project or event.
Stroke: "Masterstroke" refers to an extremely skillful act or move.
Piece: "Masterpiece" is a work of outstanding artistry, skill, or workmanship.
Of ceremonies: "Master of ceremonies" is the official host of an event or performance.
All of these common phrases start with the word "master".