Here are some possibilities:
* Aesop's Fables: Aesop is a well-known storyteller associated with numerous fables featuring animals, including foxes. You might be thinking of a story like "The Fox and the Crow" or "The Fox and the Grapes."
* Other Folktales: Many cultures have stories about cunning foxes, and there are variations of fox fables worldwide.
* A specific book: If you're referring to a particular book titled "The Clever Fox," please provide more details, such as the author's name, publisher, or publication date. This would help me identify the specific work you're looking for.
Please provide more context so I can help you find the author you're looking for!