Related Clues:

• Forge sound
• Ringing sound
• "The Trolley Song" sound
• Trolley noise
• Loud, ringing sound
• A loud ringing sound
• By the sound of it, it's metallic - and see, it gets long for 6 across after a century
• By the sound of it, after a century it separates auld syne
• Metallic, by the sound of it, and it's a century long in Scotland, too
• See how lenghty this is in Scotland, by the sound of it
• Sounds as if the century in Scotland will not be a short one
• The century gets so long in Scotland, by the sound of it
• Water pipe
• Overweight tribe making a noise
• Ringing tone of former primate