set piece

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A realistic piece of stage scenery constructed to stand by itself.
2. n. An often brilliantly executed artistic or literary work characterized by a formal pattern.
3. n. A carefully planned and executed military operation.
4. n. A situation, activity, or speech planned beforehand and carried out according to a prescribed pattern or formula.

Wiktionary

1. n. a piece of freestanding stage scenery
2. n. any carefully planned sequence of operations, especially as part of a military operation
3. n. an elaborate action scene in a movie or video game
4. n. soccer any planned strategy that a team uses after play is restarted with a free kick, penalty kick, corner kick, goal kick, throw-in or kickoff.

WordNet 3.0

1. n. a piece of scenery intended to stand alone as part of the stage setting