The term 'skull covering' can be solved by the crossword solution 'SCALP, ' which is a five-letter word. The SCALP is the layer of skin that covers the skull and is composed of two distinct layers: the epidermis and the dermis. It is also home to hair follicles, sweat glands, and sebaceous glands. The SCALP is an important part of the body's protective system, as it helps to protect the skull from injury and infection.