The term 'clerical tunic' refers to a type of clothing worn by members of the clergy. The ALB, which is an abbreviation for the Latin word alba, is a white garment that is typically worn over other clothing and is often used as a symbol of purity and holiness. It is usually made of linen or cotton and is often decorated with embroidery or lace. The ALB is an important part of clerical dress and is often seen in religious ceremonies.