Possible Clues:

• Short-tailed feline
• Feline without tail from neighbouring Isle
• One pursuing mice — and it's not much behind
• Finally stumped the pet
• Man cannot have bred it like 9 down
• ''And thereby hangs a tale'', Not there, by the sound of it
• Tail-less feline from Isle of Man
• Tailless moggy
• Domestic feline lacking a tail (4, 3)
• Often tailless feline