Answer:

byplay

Answer	Crossword Clue
BYPLAY	Side action
BYPLAY	Action on the side
BYPLAY	Certain action on the stage.

BYPLAY	Incidental stage business.
BYPLAY	Incidental activity
BYPLAY	Actor's incidental activity
BYPLAY	Dramaturgy commentary

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.