The term 'IMPRESSIVE SIGHTS AT AFFAIRS' can be summed up by the crossword solution SPREADS, which is a seven letter word. SPREADS refers to the impressive decorations and displays that are often seen at formal events such as weddings, galas, and other special occasions. These decorations can include elaborate floral arrangements, luxurious table settings, and other eye-catching elements that help to create an atmosphere of grandeur and elegance.