The term 'quick hairstyle' can be summarized by the solution to the crossword clue 'BUN' (3 letters). A BUN is a type of hairstyle that is created by gathering the hair into a knot or loop at the back or top of the head. It is a popular and versatile style that can be dressed up or down, and is often used for formal occasions. Buns are also a great option for those looking for a quick and easy hairstyle that can be done in a matter of minutes.