Possible Clues:

• 'Casablanca' woman
• Rick's flame
• She walked into Rick's gin joint
• Rick's "Casablanca" love
• ''Casablanca'' heroine
• "Casablanca" woman
• Ingrid's role in "Casablanca"
• Rick's old flame
• The "kid" in "Here's looking at you, kid"
• She came into Sam's joint