Related Clues:

• Duty-free?
• Absent with consent
• Off base with consent
• Absent with permission
• Off base for vacation
• Taking a sabbatical
• Away for a while
• Vacationing off base
• Vacationing, in a way
• Temporarily not working
• Vacationing from the base
• Away from a teaching post
• Legally out
• Off for a stretch
• Ashore, maybe