The term 'FORMAL OUTFIT' can be summarized as a type of clothing that is typically worn to formal events such as weddings, proms, and other special occasions. The crossword solution for this term is 'TUX', which is short for tuxedo. A tuxedo is a type of formal wear consisting of a jacket and trousers with a matching waistcoat or vest, typically made from black or midnight blue fabric. It is usually worn with a white dress shirt, black bow tie, and black dress shoes.