Related Clues:

• Trying traveling
• It's quite a slog
• Plod; safari
• Can't spread out in seat? Here's another way to travel!
• Spock from "Star ___"
• Tough hike
• Challenging journey
• King, tense over guards on journey
• Can't turn in unusually rare hired vehicle
• Space programme without leading actor is a real slog!
• Long walk of trees reduced by two kilometres
• Challenging hike
• Climbing Kilimanjaro, e.g
• "Star ___" (film franchise with John Cho)
• ''Star ___'' (TV show)