| APOCRYPHA | I say! Cryptographer's decrypted registry with these books (9) |
| IDEOGRAMS | Chinese characters, say, creating a grid some decrypted (9) |
| LIBRARIES | These book collections make Blair rise anew (9) |
| ROUTINELY | Regularly decrypted your intel (9) |
| DELAVINDE | The first European manual on cryptography (c. 1379) was a compilation of ciphers by this cryptographer from Parma, who served Pope Clement VII. |
| THESAURUSES | Folk with spring birthdays welcoming what's in these books (11) |
| USSENATOR | 52 Across or 47 Down, when they wrote these books |
| ORDERS | Nuns are into these books (6) |
| OBESE | An over-fat entry in these books is shown up (5) |
| ENCYCLOPEDIAS | Policy encased in order to be in these books (13) |
| DICTIONARIES | Language and a sign of the zodiac are in these books (12) |
| PYROTECHNICS | Shone with cryptic decrypted showing brilliance? (12) |
| INCLEAR | Incorporated dramatic king, now decrypted (2,5) |
| STEALTH | Decrypted the last secret procedure (7) |
| OMEGA | Love game decrypted in letter to Greeks |
| SAFETYPINS | Security devices from fan site spy decrypted (6,4) |
| COMBINATIONLOCK | Doctor, tucking into cocktail onion, decrypted digital security system (11,4) |
| POCKETED | Code kept in a decrypted state may be stolen (8) |
| OUTPACED | A code, put in a decrypted format, is surpassed (8) |
| LIFESPAN | Decrypted files criticise maximum time spent working (4,4) |
