| CRYPTO | Ordinary underground cell first for secret member of an organisation (6) |
| PRIVATE | Secret member of military personnel (7) |
| PROTOPLASM | Living matter of a plant or animal cell, first observed (as 'sarcode') by French biologist Felix Dujardin in 1835 (10) |
| ESPYEUSTYLES | Camper in cell first |
| FABIAN | Member of an organisation of Socialists (6) |
| SCOUTS | Members of an organisation for young people founded by Robert BadenPowell in 1908, motto be prepared (6) |
| FIBRIL | No truth in King of Galway getting left something from the underground cell (6) |
| SMEUSE | A dialect word, combining the Old French for "secret hiding place" and "smoot", meaning a small hole, for a gap in a fence or hedge for the passing of a rabbit or a hare (6) |
| CABALS | Word, from Hebrew for "tradition" and a supposedly acronymic name of Charles II's private ministry, for secret cliques, complots or intrigues (6) |
| GOSSIP | Tattler reports green light for secret service in middle of Saipan (6) |
| CRYPTS | Underground cells or chapels (6) |
| SPOOKY | Strange for secret agent to protect rings with crook back (6) |
| HUDDLE | Confusion with Henry replacing Mike for secret conference (6) |
| TRYSTS | Go with odd sites for secret meetings (6) |
| RECESS | No time for secrets when forced to take a break (6) |
| BRENDA | Miss Blethyn, Best Actress Oscar nominee for Secrets & Lies (6) |
| SECURE | Safe for secret communications |
| ARCANA | From "chests", a word for secrets or mysteries that are characteristically concealed or hidden, as if shut up in a box (6) |
| PARAMILITARY | Member of an organisation with an army-like structure, functioning outside of a country's armed forces (12) |
| BROWNIEGUIDE | Member of an organisation for girls (7,5) |
