Hairstyle that can be casual or formal

UPDO

Think of a way to style long hair off the neck, often secured with pins or ties—popular for both weddings and quick everyday fixes.

An "updo" is a hairstyle where the hair is arranged up and away from the face, often secured with pins or ties. It fits the clue because it works for both casual settings, like a messy bun, and formal occasions, like an elegant chignon or braided upstyle. The term itself is straightforward—no wordplay—just a direct description of how the hair is styled.