The term 'Horse Tail' can be broken down into two crossword solutions: SHOE (4 letters) and SENSE (5 letters). A horse tail is a long, flowing mane of hair that grows from the back of a horse's neck. It is usually kept long and groomed to maintain its appearance. The term 'SHOE' in this context refers to the practice of trimming the tail of a horse, which is done for both aesthetic and practical reasons. The term 'SENSE' in this context refers to the fact that horses use their tails to communicate with each other and to express their emotions.