15 letters 1962 Robert Mitchum/Shirley MacLaine film ... or the outcome of 17- and 40-Across? Answer: TWOFORTHESEESAW
15 letters 1940 Crosby/Lamour/Hope film that was the first of a "travel" series Answer: ROADTOSINGAPORE
15 letters 1960's pop group named after a phrase from "A Midsummer Night's Dream" Answer: EVERYMOTHERSSON