Related Clues:

• Middle muscles, for short
• They're often crunched
• Workout target
• Core group
• Sit-up target
• Sit-up targets
• Middle manager's focus?
• 'Washboard' body parts
• Six-pack muscles
• Mr. America's pride
• Exerciser's pride
• Midsection muscles, for short
• Six-pack, maybe
• Six-pack ___
• Some muscles