Possible Clues:

• Virtuoso's solo
• Soloist's showpiece
• Passage near the end of a concerto
• Solo concerto passage
• Passage had many a study before reaching South Africa
• Solo passage can daze when being played
• Impromptu insertion in piece of music
• Elaborate passage near the end of a piece of music
• Account to study A-to-Z on the return passage
• Virtuoso passage unknown in a dance movement