Related Clues:

• Steps up?
• Shuttle outing
• Lick, in message from the lips, for an out-of-this-world experience
• An out-of-this-world stroll?
• Out-of-this-world experience sealed by lover, having popped speed
• Loving message about speed as an out-of-this-world experience
• Stroll around the station?
• What NASA calls an EVA
• To NASA, it's an EVA
• Love letters sent round with due respect to — EVA!
• Tethered astronaut's activity
• ''Gravity'' excursion