Tail docking is a practice that involves surgically removing part or all of a horse's tail. This was historically done for practical reasons, such as preventing flies from bothering the horse or to make it harder for the horse to injure itself on obstacles. However, tail docking is now considered unethical and unnecessary by many horse owners and organizations.
Clydesdales, with their distinctive long tails, are bred for their beauty and strength. Their tails are crucial for communication, swatting away insects, and maintaining hygiene.
Therefore, it is highly unlikely that a Clydesdale would have its tail cut.