Possible Clues:

• The going rate for dramatic entertainments
• A lead in tragedy in that place, a playhouse
• At this stage it's all for show
• The rate of performance
• The stage at which the rate is after getting mixed
• The rate is just for show
• Building for plays or operations
• Perhaps Olivier's performing at three?
• The rate here is all for show
• Object of illuminating work in early book