Related Clues:

• Class act?
• ''Old college'' thing
• Give (it) a whirl
• Test, as patience
• Classroom challenge
• True-false, for one
• Not an actual alert
• Pop quiz, e.g.
• Do lab work on
• 'Go for it!'
• Have a go at it
• Clinical study
• Reason to say "1, 2, 3..."
• Run up the flagpole, e.g.
• Stab or shot