Classic Hitchcock film, and a hint to the end of 18-, 23-, 38- and 50-Across 10 letters

Crossword clues for Classic Hitchcock film, and a hint to the end of 18-, 23-, 38- and 50-Across 10 letters:

REARWINDOW: Classic Hitchcock film, and a hint to the end of 18-, 23-, 38- and 50-Across