TIP (42A. Gratuity); ECU (6D. Bygone French coin); and 7. “ … NOR a lender be”. People in the puzzle -- joining Duran Duran are KEATON (4D. Buster on the silent screen); a HINDU (9D. Worshiper of Brahma); ARTURO (11D. Conductor Toscanini); CHE (40D. Fighter with Fidel); a SGTMAJ (45D. High-ranking