Related Clues:

• Gun-barrel diameter
• Inside tube diameter
• Source of pep?
• Paint like Pollock
• Dullsville denizen
• Annoyance for an insomniac
• Be tedious
• Leak sound
• Tube diameter
• Make sleep
• Sound from a coffee maker
• Drill a hole
• Tiresome speaker
• Insomnia cause
• Inner diameter