The term 'BISHOP's Toppers' refers to the traditional headgear worn by bishops in the Christian church. The headgear is also known as a miter, which is a six-letter word that can be used to solve the crossword puzzle. The miter is a tall, pointed hat that is typically made of stiff fabric and is decorated with embroidery or jewels. It is worn by bishops during religious ceremonies and is a symbol of their authority.