Possible Clues:

• Pooch from "The Wizard of Oz"
• "And your little dog too!" dog
• Wizard of Oz companion, little one close to Dorothy's heart?
• One of five who heeded the directions in the first words of 17-, 25-, 40-, 52- and 66-Across
• Film pooch in a tornado
• Thorn in Almira Gulch's side
• Storied Kansan canine
• Dog in Kansas
• Oz pup
• 1930s film dog