Related Clues:

• Boot camp, typically
• See 19-Down
• Harrowing experience
• See 56-Across
• Midterm, for one
• Use a cupel
• Dreaded class word
• Step in getting a license
• Big test
• Final, perhaps
• Pro or con follower
• It makes the grade
• Difficult experience
• Word with litmus or taste
• Try out