Possible Clues:

• A number switches in musical
• Source of the sample in Jay-Z's 'Hard Knock Life (Ghetto Anthem)'
• She's more shrewd at heart!
• Warbucks's charge
• Sharpshooter Oakley or musical orphan
• She was often little, by the sound of it
• Girl with gun in musical
• Writer Proulx
• Pulitzer author Dillard
• Sounds as if she has a lorry, so let her get her gun