Related Clues:

• Part of a sonnet
• Tripled trio
• Opus for nine
• Musical group
• Six musicians
• Mendelssohn's __ in E flat
• Guitar strings, e.g.
• Group of eight singers
• Largish jazz combo
• Last six lines of poetry
• Merger of two quartets
• Row of pawns, e.g.
• Schubert's __ in F major
• Schubert composition
• Mendelssohn wrote a notable one at age 16