| Thinner component | 17 |
| Thinner components | 18 |
| Thinner compound | 16 |
| Thinner elements | 16 |
| Thinner in density, as gases | 28 |
| Thinner option | 14 |
| Thinner than thin | 17 |
| Thinner's prevention | 24 |
| Thinner, as air | 15 |
| Thinner, as smoke | 17 |
| Thinners | 8 |
| Thinnes of "The Invaders" | 35 |
| Thinness | 8 |
| Thinness comparison | 19 |
| Thinness description | 20 |
| Thinness standard | 17 |
| Thinness symbol | 15 |
| Thinnest | 8 |
| Thinnest coin | 13 |
| Thinnest coins | 14 |
| Thinnest iPods | 14 |
| Thinnest U.S. coin | 18 |
| Thinnest US coin | 16 |
| Thinning agent | 14 |
| Thinning agents | 15 |
| Thinning atmospheric layer | 26 |
| Thinning hair treatment | 23 |
| Thinning in the middle? | 23 |
| Thinning layer | 14 |
| Thinnish middle? | 16 |
| Thinny-thin person | 18 |
| Thins | 5 |
| Thins out | 9 |
| Third | 5 |
| Third addendum to a letter | 26 |
| Third after delta | 17 |
| Third afterthought in a letter: Abbr. | 37 |
| Third afterthought in a missive: Abbr. | 38 |
| Third afterthought, in a ltr. | 29 |
| Third and fourth words of a soliloquy | 37 |
| Third and long option | 21 |
| Third anniversaries | 19 |
| Third anniversary gift | 22 |
| Third Army commander in WWII | 28 |
| Third Army leader | 17 |
| Third Army's area | 21 |
| Third Asia album | 16 |
| Third base | 10 |
| Third base coach's hand movement | 36 |
| Third base coach's sign when the count is 3-0, typically | 60 |
| Third base coach's urging, maybe | 36 |
| Third base, colloquially | 24 |
| Third base, in baseball lingo | 29 |
| Third base, in baseball lingo ... or a hint for answering eight other clues in this puzzle | 90 |
| Third base, so to speak | 23 |
| THIRD BASEMAN | 13 |
| Third baseman and two-time All-Star Melvin ___ | 46 |
| Third baseman Chris who was the 1988 National League Rookie of the Year | 71 |
| Third baseman David Freese was its MVP in 2011 | 46 |
| Third baseman Longoria | 22 |
| Third baseman Melvin | 20 |
| Third baseman Rodriguez | 23 |
| Third baseman Ron nicknamed "the Penguin" | 51 |
| Third baseman Ron posthumously elected to the Hall of Fame in December 2011 | 75 |
| Third baseman Ron who started three 1970s All-Star Games | 56 |
| Third baseman Todd | 18 |
| Third baseman who won 16 consecutive Gold Gloves, 1960-75 | 57 |
| Third baseman's domain, and a hint to this puzzle's theme | 65 |
| Third before JFK | 16 |
| Third bk of the Bible. | 22 |
| Third bk. of the Bible | 22 |
| Third Bond portrayer | 20 |
| Third book in the "Twilight" series | 45 |
| Third book of the Bible: Abbr. | 30 |
| Third book of the Book of Mormon | 32 |
| Third book of the New Testament | 31 |
| Third calendar box | 18 |
| Third canonical hour | 20 |
| Third caste in "Brave New World" | 42 |
| Third century date | 18 |
| Third Chinese dynasty | 21 |
| Third class?: Abbr. | 19 |
| Third cliché of the speech | 29 |
| Third club member | 17 |
| Third col. on a calendar | 24 |
| Third come-on | 13 |
| Third cousin, for one | 21 |
| Third cousin, say | 17 |
| Third Crusade leader | 20 |
| Third Crusade siege site | 24 |
| Third day abbr. | 15 |
| Third day of the wk. | 20 |
| Third deadly sin | 16 |
| Third deg. | 10 |
| Third deg.? | 11 |
| Third degree | 12 |
| Third degree for a third degree? | 32 |
| Third degree giver | 18 |
| Third degree of a musical scale | 31 |
| Third degree, for some | 22 |