The term 'ornamental plume' is composed of two crossword solutions, 'PANACHE' and 'EGRET'. PANACHE is a French word meaning a showy display of courage or daring, often associated with a flamboyant style of dress. An EGRET is a type of white heron, known for its long, slender neck and elegant feathers. Together, these two words describe an ornamental plume, which is a decorative feather or feather-like object used to adorn clothing or other items.