Possible Clues:

• Like Williams's 'Suddenly Last Summer'
• Like Samuel Beckett's 'Endgame'
• Like Pinter's 'The Dumb Waiter'
• Like Strindberg's 'Pariah'
• Without intermission, as a play
• Lacking a break
• With 59-Across, some works of Tennessee Williams
• Sans intermission
• Like 'The American Dream' by Edward Albee
• Length of an Off-Broadway play, perhaps