CLUTCH BAGS: No dangling straps or bulging bags for Kate - it's all about the sleek, inscrutable box clutch. She has them in all the colors of the rainbow, but her most used are in go-with-everything tan, cream, chocolate, black, and navy, while her favorite labels are L.K.Bennett, Stuart Weitzman, Jenny Packham, and Alexander McQueen. Now if only we knew what she kept in them . . .