NestGregory Carlock Ishtar said goodbye to the elephants, goodbye to the clowns, waved to a group of admirers who had gathered on East 43rd Street, and was ushered into a shiny new Escalade, which the NYPD reserved for such occasions. I am the earth, she said, as the cops forced her head through the doorframe. The motorcade, fit for heads of state, went 40 down the West Side Highway, past rollerblading homosexuals and New School undergraduates, who held