Related Clues:

• Bump in the road
• Grab onto
• Sweater flaw
• Negotiations delay
• On-screen plane?
• Radar echo
• Radar sign
• Unforeseen complication
• Schedule spoiler
• It's 'catchy'
• It's barely noticeable
• Brief upturn
• Nylon woe
• Control tower image
• Jet, to an air traffic controller