The term TERRIER'S TETHER is a crossword solution for the word LEASH, which has five letters. A LEASH is a rope or strap that is used to restrain an animal, such as a dog, and is typically attached to a collar or harness. It is commonly used to keep a pet from running away or getting into trouble. The term TERRIER'S TETHER specifically refers to the LEASH used to restrain a terrier, which is a type of small, energetic dog.