Related Clues:
- Document classification
- Keep it under your hat!
- With 74-Across, voting system that affords anonymity ... or the theme of this puzzle?
- Erect post (anag)
- Concealed after upturned pot hides mole's adventures
- It can be dangerous when leaked
- Known to but a few
- With respect to novel, it's not to be published
- Doctor erects what should be know to few
- Erects building out of the way
- Not public school receiving royal backing
- Dark forces clued around this grid
- Woody, Arlo or Gwen maybe
- One not to be divulged
- Small child creeps awkwardly in, visible to hardly anyone?