Related Clues:

• Pop quiz, e.g.
• Famous muscle man
• Do lab work on
• Mythical holdup man?
• Book with routes
• Clinical study
• Travel guide
• Globe-trotter's reference
• Reason to say "1, 2, 3..."
• Run up the flagpole, e.g.
• Hurdle of sorts
• A moon of Saturn
• Midterm event
• Do lab work
• Book with a key