Ilsa is the answer to the crossword clue 'Sing it, Sam Speaker'. Ilsa is a character from the classic 1942 film Casablanca. She is played by Ingrid Bergman and is the love interest of Humphrey Bogart's character, Rick Blaine. Ilsa is a Czech Resistance leader who is married to Victor Laszlo, a fugitive Czech Resistance leader. The phrase 'Sing it, Sam' is a reference to a scene in the movie where Ilsa requests that Sam, the piano player, sing the song 'As Time Goes By'.