Possible Clues:

• Missing person, a worker posted to the interior?
• Student not in class
• Person missing beat seen to be confused
• One missing a book dispatched by European conglomerate, finally
• Sailor dispatched to the ends of empire — one who can't be here
• One who is missing or away
• One missing a work meeting told to go inside
• Person away from work or school
• Sailor sent to quarters for being a defaulter
• Base teen wrecked, one not seen?