a way with words! MORTONSALTGIRL (16A. Ad icon since 1914); PENGUIN (37A. Oswald Cobblepot’s nom de crime); MARYPOPPINS (11D. Caretaker for the Banks household); and CHAMBERLAIN (24D. Churchill predecessor) are the inter-related entries along with CARRY UMBRELLAS (56A. What 16- and 37-Across and 11- and 24-Down were all known to do).