The term 'Canine Cover' can be broken down into two crossword solutions: ENAMEL (6 letters) and TARTAR (6 letters). ENAMEL is a type of hard, glossy coating that is applied to metal, glass, or ceramics. It is often used to protect surfaces from corrosion and wear. TARTAR is a type of hardened dental plaque that forms on the teeth and gums. It is composed of bacteria, food particles, and saliva, and can cause tooth decay and gum disease if not removed. Together, these two solutions form the term 'Canine Cover, ' which refers to the protective ENAMEL coating and TARTAR buildup on a dog's teeth.