Possible Clues:

• A cause of pain, as a critic runs out in panic!
• Pain in back, hip or leg
• Lower back and hip pain
• Complaint (without date) about American spies with a twitch
• Intense pain in the leg
• Back and leg pain
• Disorder around the hip
• Neuritis affected Asiatic chap at first
• 'Start to sigh with pain round about Athens, by the sound of it (8)'
• Intensely painful form of neuralgia