Manhattan Diary about Chloe Sevigny, 19, who is a downtown trendsetter of the moment. She was in a Sonic Youth video, recently in Details, in a series of photographs by Larry Clark, who has just cast her in his new movie "Kids". Her first break came at 17, when she was picked for a Sassy shoot, and was asked to be a summer intern there. Around that time, she posed for a fashion spread in Paper. A stylist, Gabriel Feliciano, said, "People want to project their desire on one girl. She's smart enough to hold back, and that allows us all to project whatever we want to. I could go on and on about Chloe, but actually I know very little about her."