Related Clues:

• Screening
• Major hassle
• It's trying
• Grueling experience
• Test of one's mettle
• Assessing
• It's often spoken into microphones
• It's no picnic
• '1, 2, 3' lead-in
• Trying period
• Major trial
• Trier of men's souls
• Boot camp, as a rule
• Hardly a walk in the park
• Tough trial