There is a total of 6423 clues beginning with op
- Opus for practice
 - Opus of 54 Across
 - Opus of 80 Across
 - Opus of formal pattern
 - Opus originally called the "Bonaparte Symphony"
 - Opus played one in "Bloom County"
 - Opus set in Troy
 - Opus verse
 - Opus with singing
 - Opus __
 - Opus __: "The Da Vinci Code" sect
 - Opus ___
 - Opus ___ ("The Da Vinci Code" group)
 - Opus ___ ("The Da Vinci Code" organization)
 - Opus ___ ("The Da Vinci Code" sect)
 - Opus ___ (God's work)
 - Opus ___ (group depicted in "The Da Vinci Code")
 - Opus ___ (religious group featured in "The Da Vinci Code")
 - Opus ___ (work of God)
 - Opus _____ (work of God)
 - Opus
 - Opus: Abbr
 - Opuses for nine