Possible Clues:

• Membrane around fetus
• Membrane found on child's head at birth, considered lucky
• Being the reason for
• Membrane sometimes on child's head at birth
• Harry ___, Gene Hackman role in 'The Conversation'
• Membrane that makes phone be heard
• Membrane around a foetus, or part of it on a baby’s head at birth
• Good omen at birth
• Membrane
• Membrane enclosing a fetus