Which word, borrowed from Italian music, means a smooth, uninterrupted transition from one thing to another?

Alec Baldwin played a psychopathic ex-con in the 1990 thriller "___ Blues." Which city completes the title? At the hip joint, which thighbone joins the pelvis? What is the "election before the election," in which a party's voters choose its candidates for the general election? Called "Curly" as a youth, which Lakota war leader was a key commander in the defeat of Custer at the Little Bighorn? The lychee, a rough-shelled red fruit, originated in which country? Which 22-year-old rock star died with Ritchie Valens and the Big Bopper in a plane crash on February 3, 1959? Fess Parker played the title pioneer and Ed Ames his friend Mingo on which 1960s TV series set in Kentucky? The biography "Dark Safari" tells the story of which explorer, who went looking for David Livingstone?