Possible Clues:

• Pain in the neck
• Credit check ignoring capital is a pain in the neck
• Watson's partner
• Pull tail from de-energised insect
• Neck discomfort
• Neck injury
• Sort of cramp putting two tail-enders out of game
• Wrench (neck or back)
• Co-discoverer of the contents of the circled letters
• Muscle spasm in the neck