Related Clues:

• Fingerboard ridge
• Stay awake nights
• Agonize
• Overdo the 'what if?'
• Ridge on a guitar neck
• Bite one's nails
• Worry excessively
• Wring one's hands
• Neck piece
• Neckline?
• Toss and turn
• Guitar neck feature
• Act the worrywart
• Guitar bar
• Anguish