| Secret business associate | 25 |
| Secret attachment, for short | 28 |
| Secret associates | 17 |
| Secret area of anatomy? | 23 |
| Secret and foreign | 18 |
| Secret alternative | 18 |
| Secret agents | 13 |
| Secret agent's need | 23 |
| Secret agent TV show of the '60s | 36 |
| Secret agent Matt | 17 |
| Secret agent Leamas in "The Spy Who Came In From the Cold" | 68 |
| Secret agent disguised as a clergyman? | 38 |
| Secret agent created by John P. Marquand | 40 |
| Secret agent created by a 1938 Pulitzer winner | 46 |
| Secret agent | 12 |
| Secret agcy. | 12 |
| Secret affairs | 14 |
| Secret advisers | 15 |
| Secret advantage | 16 |
| Secret add-on | 13 |
| Secret (and potentially cataclysmic) substance in Kurt Vonnegut's "Cat's Cradle" | 98 |
| Secret '40s org. | 20 |
| Secret | 6 |
| Secrest's ''American Top 40'' predecessor | 61 |
| Secrecy, with "the" | 29 |
| Secrecy, so to speak | 20 |
| Secrecy thwarter | 16 |
| Secrecy problem | 15 |
| Secrecy metaphors | 17 |
| Secrecy metaphor | 16 |
| Secrecy medium | 14 |
| Secrecy fiat | 12 |
| Secrecy fabric? | 15 |
| Secrecy breach | 14 |
| Secrecy | 7 |
| Secque or sollaret | 18 |
| Secque or brogue | 16 |
| Seconds? | 8 |
| Seconds: Abbr. | 14 |
| Seconds, sometimes | 18 |
| Seconds, say | 12 |
| Seconds, of a sort, for a ruminant | 34 |
| Seconds, of a sort | 18 |
| Seconds, in boxing | 18 |
| Seconds, e.g. | 13 |
| Seconds, at the table | 21 |
| Seconds, at dinner | 18 |
| Seconds, at a meal | 18 |
| Seconds participate in them | 27 |
| Seconds on TV? | 14 |
| Seconds on a watch | 18 |
| Seconds in the air, to punters | 30 |
| Seconds in command | 18 |
| Seconds from the soda fountain | 30 |
| Seconds for Tyson | 17 |
| Seconds for Holmes | 18 |
| Seconds flat | 12 |
| Seconds at the table | 20 |
| Seconds at the dinner table | 27 |
| Seconds and then thirds | 23 |
| Seconds ago | 11 |
| Seconds (abbr.) | 15 |
| Seconds | 7 |
| Secondmost populous place | 25 |
| Secondly | 8 |
| Secondhand-shop owner | 21 |
| Secondhand-goods mart | 21 |
| Secondhand transactions | 23 |
| Secondhand transaction | 22 |
| Secondhand tire, perhaps | 24 |
| Secondhand tire | 15 |
| Secondhand stuff | 16 |
| Secondhand store transactions | 29 |
| Secondhand store transaction | 28 |
| Secondhand store section | 24 |
| Secondhand store | 16 |
| Secondhand sign | 15 |
| Secondhand shop's business | 30 |
| Secondhand shop deal | 20 |
| Secondhand rental | 17 |
| Secondhand products | 19 |
| Secondhand girl | 15 |
| Secondhand gal of song | 22 |
| Secondhand deal, e.g. | 21 |
| Secondhand deal | 15 |
| Secondhand | 10 |
| Seconder's opinion | 22 |
| Seconded | 8 |
| Secondary: Abbr. | 16 |
| Secondary-school club? | 22 |
| Secondary, as an outlet: Abbr. | 30 |
| Secondary wagers | 16 |
| Secondary wager | 15 |
| Secondary to | 12 |
| Secondary thoroughfare | 22 |
| Secondary theorem | 17 |
| Secondary study | 15 |
| Secondary strategy | 18 |
| Secondary statute | 17 |
| Secondary stake | 15 |