Related Clues:

• Gentle attention-getter
• Not much of a knock
• Word that becomes its own synonym when spelled backward
• Bug, as a phone
• 'Singin' in the Rain' dance style
• Harry Shearer band Spinal ___
• Michael McKean band Spinal ___
• Spinal ___
• "This Is Spinal ___"
• Irishman holds up one of those in the bar
• Physical attention-getter
• When repeated, testing of a mic
• Put bugs in someone's home
• Drip source, at times
• Activate, as a phone app