| Not meant to be repeated | 24 |
| Like some identities | 20 |
| Known to but a few | 18 |
| Kind of agent or ballot | 23 |
| It might be hard to keep | 24 |
| It might be deep and dark | 25 |
| It may be under your hat | 24 |
| It may be hard to keep | 22 |
| It may be hard for one person to carry | 38 |
| It can be dangerous when leaked | 31 |
| For your eyes only | 18 |
| For only a select few | 21 |
| Diary tidbit | 12 |
| Class above confidential | 24 |
| Christie's "The ___ of Chimneys": 1925 | 52 |
| Brand behind becauseyourehot.com | 32 |
| "I've Got a ___" (game show) | 42 |
| Valentine sender, maybe | 23 |
| Too shy a lover | 15 |
| Sender of an anonymous valentine, perhaps | 41 |
| Mysterious letter writer, maybe | 31 |
| Anonymous valentine sender | 26 |
| Anonymous fan | 13 |
| 1966 Johnny Rivers hit | 22 |
| "Mission: Impossible" types | 37 |
| Desk used for writing | 21 |
| U.N. group of 1973? | 19 |
| U.N. bet: 1973 | 14 |
| Triple Crown winner: 1973 | 25 |
| Offspring of Bold Ruler and Somethingroyal | 42 |
| Horse of 1973 | 13 |
| Diplomatic winner of 1973 Derby? | 32 |
| Belmont Park statue subject | 27 |
| 1973 Triple Crown winner | 24 |
| People in a cabinet | 19 |
| Group honored in April | 22 |
| Special days in the spring | 26 |
| Powell or Rumsfeld | 18 |
| Della Street, for instance | 26 |
| Cabinet part | 12 |
| Quilled flier | 13 |
| African raptor | 14 |
| Francis Bacon, to Izaak Walton | 30 |
| Cabinet official | 16 |
| Status honored during the diagonal occasion, in April | 53 |
| Voting method | 13 |
| Australia was the first country to implement it | 47 |
| Show-of-hands alternatives | 26 |
| Cryptographer's creation | 28 |
| Writing that's hard to read | 31 |
| "CQN ZDRLT KAXFW OXG SDVYB XENA CQN UJIH MXP," e.g. | 61 |
| Some spy materials | 18 |
| Results of some substitutions | 29 |
| Encrypted Scriptures? | 21 |
| Rhinovirus kept under wraps? | 28 |
| Underground artists, maybe | 26 |
| Conceal in a hiding place | 25 |
| Place out of sight | 18 |
| Give off, like pheromones | 25 |
| Do a gland's job | 20 |
| Exude, as a poison | 18 |
| Produce, as a hormone | 21 |
| Discharge, as a liquid | 22 |
| Placed out of sight | 19 |
| They might be behind bookshelves | 32 |
| Masked marathon runners? | 24 |
| Squirrel, at times | 18 |
| Stashes out of sight | 20 |
| Generates, as fluids | 20 |
| Emits, as pheromones | 20 |
| Fictional park that's out of sight? (with ''The'') | 70 |
| F.H. Burnett's children's classic (''The'') | 67 |
| F.H. Burnett's children's classic (with "The") | 64 |
| Classic of English children's literature, with "The" | 66 |
| Part of a fraternity ritual, perhaps | 36 |
| Order confirmation? | 19 |
| Members-only signal | 19 |
| Insider's knowledge | 23 |
| Clark Kent vis-Ã -vis Superman | 32 |
| Maxim, part 2 | 13 |
| Hidden atomic particles? | 24 |
| Entrance requirement for some clubs | 35 |
| Sweet song, by Webster and Fain: 1953 | 37 |
| In a hush-hush way | 18 |
| In a clandestine manner | 23 |
| How plots are planned | 21 |
| Saliva-producing organism, e.g. | 31 |
| What a mysterious restaurant critic has? | 40 |
| Food critic's love of fast food, maybe? | 43 |
| The library in an old mansion may have one | 42 |
| Haunted house feature, often | 28 |
| Logging-on need | 15 |
| Entry requirement, sometimes | 28 |
| Spy's entry requirement | 27 |
| Confidential scheme | 19 |
| KGB, e.g. | 9 |
| A2: "Say, what's the 'sensitive document' our guy grabbed?" A1: "A ___, of course." A2: "Ah! Figures." | 146 |
| Spies seek them | 15 |
| Confidential things | 19 |
| Classified stuff | 16 |