Related Clues:

• Not public school receiving royal backing
• Dark forces clued around this grid
• Woody, Arlo or Gwen maybe
• One not to be divulged
• Something hidden from E. Phillips Oppenheim and Laurence Binyon
• Not known by others
• Security classification level
• Cloak and dagger
• Security marking
• Blur success, obviously full of feeling
• Not known to others
• Hidden; unknown
• Confidence shown by religious group carrying on
• About to enter camp hidden from general view
• Unknown or unobserved by others