Possible Clues:

• Miss Gulch's bête-noire, somewhat literally
• Miss Gulch's bête noire
• Movie terrier
• Miss Gulch's nemesis
• Character who was sometimes carried in a basket
• Entirely, after 'in'
• Memorable wizard debunker
• Nonspeaking part in ''The Wizard of Oz''
• Fictional Kansas barker
• Baum dog