set piece

noun

1. an arrangement of slow-burning fireworks forming a design or composition when lighted.
2. Theater. a piece of scenery used as part of a stage set, as a profile or three-dimensional construction built to stand independently on the stage floor: A few set pieces simulating rocks and a fence constituted the scenery for the first act.
3. a work of art, literature, music, etc., having a prescribed thematic and formal structure: the set pieces of Restoration comedy.
4. a scene, action, or the like, having a conventional form and functioning as part of the structure of a work of art, literature, etc.
5. a military operation carried out according to a rigid plan.
6. (in a novel, narrative poem, or the like) a passage more or less extraneous to the sequence of events, introduced to supply background, color, or the like.

noun

1. a work of literature, music, etc, often having a conventional or prescribed theme, intended to create an impressive effect
2. a piece of scenery built to stand independently as part of a stage set
3. a display of fireworks
4. sport a rehearsed team manoeuvre, usually attempted in continuous games at a restart of play, esp when the other side has been penalized for improper play