Related Clues:

• Squash
• Clinical study
• Reason to say "1, 2, 3..."
• Run up the flagpole, e.g.
• Hurdle of sorts
• Midterm event
• Do lab work
• Sound of stepping in mud
• Multiple choice, say
• Give a whirl
• Part of 57-Down
• Proven in trials
• Measuring device
• Reason for cramming
• Marketing event