Related Clues:

• Radar-screen image
• Minor interruption
• Irregularity
• Memory failure
• Come to an end, like a subscription
• Air traffic screen sight
• Need renewal
• Radar screen dot
• Instance of zoning out
• Regress
• It's monitored by an air traffic controller
• Attention-getter in the control tower
• Tiny bump on a graph
• Pass by, as time
• Air traffic controller's concern