Crossword Puzzle Stage setters

Clue: Stage setters

Tone setters for conductors (OPENINGNOTES with 12 letters)
Stage combat props (EPEES with 5 letters)
Giving Justin a breather by taking the stage for him? (SPELLINGBIEBER with 14 letters)
Comment immediately following a stage cue (IMON with 4 letters)
Stage name of Richard Melville Hall (MOBY with 4 letters)
Took to the stage (ACTED with 5 letters)
Staged (e.g. ENACTED with 7 letters)
Thing on stage (PROP with 4 letters)
Stage areas (APRONS with 6 letters)
Opening on some stages (TRAPDOOR with 8 letters)