THE ASSASSINATION OPTION   James Cronley™s first successful mission for the new Central Intelligence Directorate has drawn all kinds of attention, some welcome, some not, including from the Soviets, his own Pentagon, and a seething J. Edgar Hoover. Now complications have sprung  up all over, including a surprising alliance between the Germans and, of all things, the Mossad; and an unplanned meeting with an undercover agent against the Soviets known only as Seven K.. Cronley knows that if just one thing goes wrong, he™s likely to get thrown to the wolves. And he thinks he hears them howling now.