UPDATE 1-Italy's Agnellis eye sale of U.S. property firm Cushman & Wakefield

TURIN, March 31 (Reuters) - Exor, the Italian investment holding company controlled by the Agnelli family, is considering a possible sale of Cushman & Wakefield, the world's third-largest real estate company, and could have a clearer picture in the next month or so, Exor's chairman, John Elkann, said on Tuesday.