WASHINGTON, Nov. 13 - Deep, unresolved tensions between new leaders and senior career officers at the Central Intelligence Agency threaten to set off a rebellion within the agency's clandestine service, according to current and former intelligence officials. The tensions pit the new intelligence chief, Porter J. Goss, against the C.I.A.'s directorate of operations, the most powerful and secretive part of the agency. Winning allegiance from the career spies within the clandestine service is widely regarded as essential to the success of any intelligence chief. For now, former intelligence officials say, many career C.I.A. officers do not know whether to regard...