Related Clues:

• Laborious
• See 91-Down
• Placement determinant, often
• The 'T' of S.A.T.
• Word with acid or field
• Course obstacle
• Challenging
• School event
• Put under pressure
• Lab activity
• Shakedown cruise, e.g.
• Word with pattern or drive
• Final, say
• Student grade factor
• Take a sample of