The term 'RICK's 'CASABLANCA' Love' refers to the romantic relationship between RICK Blaine (played by Humphrey Bogart) and Ilsa Lund (played by Ingrid Bergman) in the classic 1942 film, CASABLANCA. The crossword solution for this term is 'Ilsa, ' which is a four-letter word. Ilsa is a strong-willed woman who is torn between her love for RICK and her sense of duty to her husband, Victor Laszlo. Despite their differences, RICK and Ilsa share a passionate love that transcends time and place.