Related Clues:

• Heavy dull sound
• More than a plop
• Sound of a failure
• Twice-yearly occurrence
• One of the Four Seasons
• Postwar chill (with ''nuclear'')
• Winter begins with one
• -- Springs, Fla.
• Sound after dropping off?
• Muted crash
• Bad joke's sound?
• Bad joke's sound
• Christmas time
• Discontent time?
• Hard-landing sound