The term 'walk ostentatiously' can be broken down into three crossword solutions: SASHAY (6 letters), FLOUNCE (7 letters), and PARADE (6 letters). SASHAY is a type of walking that is done in a slow, exaggerated manner with a lot of hip movement. FLOUNCE is a type of walking that is done with a lot of energy and enthusiasm, often with a lot of arm and leg movement. PARADE is a type of walking that is done in a very proud and confident manner, often with a lot of pomp and circumstance. All three of these words describe a type of walking that is done in an ostentatious manner.