Related Clues:

• Fruit center
• Bodybuilder's washboard, briefly
• Iron-pumper's pride
• Six-pack, perhaps
• 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
• Geotechnical sample
• Like some beliefs
• Apple center