Related Clues:

• Keisters
• 'Six-pack' muscles
• Car safety feature, for short
• 'Washboard' muscles
• Units in a six-pack?
• Workout target, for short
• Muscles
• Sit-up beneficiaries
• Preserves, in a way
• Puts out of work
• They may be ripped on the beach
• Tummy muscles, for short
• Sit-ups sculpt them
• They work at crunch-time
• Boots out