Had the term ‘supermodel’ been around in the ’70s, Cleveland would have earned it. First discovered on the New York subway in 1966 by a Vogue editor, the lithesome beauty with the wildly expressive face was a muse to Stephen Burrows and Halston and a regular presence on the runway and at Studio 54. A pioneer for African- American models, Cleveland’s new book Walking with the Muses (Atria) tells her whirlwind tale.