Possible Clues:

• Musician such as John Williams, Brian May or Bert Weedon
• John Williams or Andres Segovia, say
• English leaving liberal gratuities for musician
• Musician, one overwhelmed by such a basic reaction to sitar playing
• Musician has material for strings, including one form of sitar
• Band frontman, often
• Busker perhaps replaced gratuities left by English
• Musician
• Sound person having some pluck?
• Instrumentalist