Festive puzzle

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Across
  1. 5. Mirror learning and rehearsal? (10-8)
  2. 10. Work shirt, trousers, cap and jacket; a letter in the phonetic alphabet (7)
  3. 11. Working for yourself, not the police? (8-6)
  4. 13. Animal fixing on a property bag? (4)
  5. 16. Unauthorised access to data (8-6)
  6. 17. Not an amateur (12)
Down
  1. 1. We work to this code (6)
  2. 2. Another name for flags (9)
  3. 3. A division of a large organisation, dealing with a specific area of activity (10)
  4. 4. Valuable property management system (4)
  5. 6. They police the police (initials)(4)
  6. 7. Bad behaviour; Meeting or hearing (10)
  7. 8. Being rude and offensive to others (7)
  8. 9. A person who makes an enquiry? (12)
  9. 12. Alcove in a church (5)
  10. 14. A person in a position of authority; common term for a constable(7)
  11. 15. TVP department head; county? (4)