Related Clues:

• Sharp criticism, so to speak
• Anti-aircraft gun's onomatopoeic nickname
• Antiaircraft artillery
• Anti-aircraft shells or adverse criticism
• To go on strike with this would ruin your plane
• It sounds plain that that's the target
• Such criticism could get the plane down
• There's firing coming up here
• 15 across at aircraft
• Clamorous criticism
• Bad thing to catch
• Anti-aircraft artillery
• Adverse criticism almost to the end of the scale
• Brickbats aimed at military aircraft?
• Almost crumble in fire