Related Clues:

• Add liquor to, as punch
• Sudden increase on a graph
• Dot on a radar screen
• Tiny position indicator
• Radar light
• It might be on one's radar
• Abrupt increase on a graph
• EEG peak
• On-screen plane?
• Radar echo
• Radar sign
• It's barely noticeable
• Berton's The Last _____
• Brief upturn
• Control tower image