Possible Clues:

• Performer's part is temporary part
• Tatum set out to accompany one such performer
• An entertainer with little heart is temperamental
• Entertainer initially identified in Tatum's note
• Performer in part is tested
• Performer, a couple of times, separately covered by a wage increase
• Stage performer provoked a stir and emptied theatre
• Sweetheart is tested inside by skilful performer
• New satire about time with theatrical professional
• Entertainer is treat when plastered