Related Clues:

• Cause for liniment
• Throb painfully
• Need a backrub, say
• Migraine, e.g.
• What hearts do, in romance novels
• Feel a dull pain
• Tummy problem
• Naproxen target
• Result of overexercise, perhaps
• Smart but not intelligent?
• 20-Across target
• Pain in the gut
• Insulted
• Need aspirin, maybe
• Workout aftermath, perhaps