Related Clues:

• Dean eats 5 from part of shell
• It helps with inflation as controlling device when issuing note
• It's comparatively sound
• Device regulating flow
• Device to regulate flow
• Telephone call
• Alternative to knocker
• Telephone - the inventor!
• The frigate Lutine's hangs in Lloyd's of London
• Telephone call?
• Device controlling flow
• Inventor - clanger
• Metal ringer
• Device for controlling the flow of a fluid in a pipe
• It makes a ringing sound when hit with a clapper