Possible Clues:

• Turns up, university finds Lawrence with plucky sort that makes music
• Fine to abandon wind instrument for plucked one
• Minstrel's music maker
• Renaissance musicmaker
• Not loud, or it would have been in the wind section
• Instrument's no lead instrument
• Julian Bream's instrument
• Fellow leaves one instrument for another
• Clay and cement mixture used as a protective covering
• One's made to pluck hot stuff from one's mouth