Possible Clues:

• Where the audience can't see
• Invisible to an audience
• Taking place in the area not visible to the audience
• Men only put in reduced bid behind the scenes
• The wings of duck for party in the abbey
• One’s first step, embracing females in the wings
• Not visible to the theatre audience
• Old party with most of those in 19 down in the wings
• Old Trafford side gets a thrashing on the wings?
• Where Ophelia dies