Related Clues:

• Regret concerning signalling system
• Mental pain or distress
• Cause of reddening, perhaps
• Hunger striker's discomfort
• 'For ___!'
• One might accompany a growling stomach
• Cause to turn red, perhaps
• Bit of hunger
• Bit of anguish
• Hint of hunger
• Regret about one responsible for coded messages
• Brassy person's lack
• It reminds one of the hunger in capitals of Papua and New Guinea
• "That's a __"
• Feeling of hunger or guilt