Related Clues:

• Owl's cry
• With 40-Across, nocturnal noisemaker
• Call heard at night
• Not the sound of a bird by 17 across
• What you might not give for the owl, and the owl would always give
• Not the sort of thing a bull would do with its horn, by the sound of it
• The horned owl, by the sound of it
• What the unicorn is not able to do with its horn?
• Raucous cry
• Razzing yell
• Toy, to a tot
• Fourth word in the ladder
• Extremely hot over ridicule
• Laugh is a blast
• Amusing person in house with contents of note