Related Clues:

• Major trial
• Traveler's ordeal
• No mere jaunt
• Voyage, to Spock
• Adventurous journey
• Difficult hike
• Voyage with Spock
• Travel laboriously
• Trier of men's souls
• Trip in the mountains
• Boot camp, as a rule
• Hardly a walk in the park
• Tough trial
• An audit may be one
• Trying time