Related Clues:

• Notch's shape
• Shape of a notch
• Dove's sign
• Hum attachment?
• Flock formation
• Third of November?
• "C'est la __"
• Ex halved
• Letter for a gaggle
• "Take Good Care of My Baby" singer Bobby
• Two-finger gesture
• Geese can form it
• Geese form one
• View introducer
• Churchill signal