Possible Clues:

• Stringed instrument with a deep round back
• String instrument spelled by removing the first letter from a woodwind instrument
• Instrument that makes money for the listener
• Instrument similar to the oud
• One instrument having topped another
• Mandolin forerunner
• Mandolin’s relative
• One with a neck and a round body
• ... regularly flaunt electronic means of creating 4?
• Broadcast spoils instrument