The crossword solutions for the term 'Mantelpiece Piece' are URN, which stands for 'URNS'. URNS are vessels that have been used since ancient times to store ashes of the dead, as well as other items. They are often made of ceramic, metal, or glass and can be decorated with intricate designs. They are commonly found on mantelpieces in homes, and are a popular way to remember loved ones who have passed away.