1. Married a US President with the same surname as herself (7,9) 12. Britain's first post-war Wimbledon champion (6,8) 14. Had a famous WW2 women's orchestra (3,6) 16. Tinkled the keys for Pickles (6,6) 19. Presides by a sleepy lagoon (6,5) 26. Has got to be worth �5 (9,3) 36. An unassuming naturalist (4,6) 45. Helped 'Betty Burke' avoid capture in 1746 (5,9)