Related Clues:

• Conservative girl's single with ring, almost pure
• Common nickname for Prokofiev’s Symphony No 1
• Genre for Bach, Beethoven and Brahms
• Like ancient Greek or Roman art
• Euclidean circle in stone square in Morecambe
• A music genre
• 'Simply patterned' encountered in Virgilian poem, not good the second time
• Traditional conservative girl I ring endlessly
• Style of music in clubs Callas is performing
• Highbrow Charlie Girl I visit briefly
• Like art using circles, squares, etc
• Using regular lines and shapes
• Music of the highest rank?
• Plane-related, say