Possible Clues:

• Musical about Dickens boy who asked for more
• Musical based on the story of Dickens boy
• He gets round what's inside him with a twist
• Actor spurning one Dickensian role?
• 1968 Oscar-winning musical
• Dickens boy ......Twist
• Musical piece for clarinet was finished by having one bar too many?
• - Goldsmith (She Stoops to Conquer)
• First name of Goldsmith, great 18th century Irish writer
• Old organ needed for stage show