When Tracy Tynan's literary parents, Kenneth Tynan and Elaine Dundy, weren't writing with sparkling wit, they were fighting, drinking and having affairs that culminated in divorce. And behind the swirl of her parents' bohemian and literary life lay loneliness and chaos, from which clothing served as a refuge. DnA talks to the LA-based costume designer and writer about her new memoir Wear and Tear: The Threads of My Life.