Related Clues:

• Test of one's mettle
• Difficult trial
• It's no picnic
• Frightening ordeal
• Trying period
• Major trial
• Trier of men's souls
• Boot camp, as a rule
• Hardly a walk in the park
• Tough trial
• An audit may be one
• Trying time
• Frightening nocturnal fantasy
• Severely trying experience
• Severe, trying experience