| Sixties drug, abbr. | 19 |
| Sixties drug | 12 |
| Sixties decal, often | 20 |
| Sixties dance | 13 |
| Sixties coll. group | 19 |
| Sixties coif | 12 |
| Sixties castoff | 15 |
| Sixties apparel | 15 |
| Sixths of an inch, to a printer | 31 |
| Sixth: It. | 10 |
| Sixth-sense phenomenon | 22 |
| Sixth-sense letters | 19 |
| Sixth-sense initials | 20 |
| Sixth-sense field: Abbr. | 24 |
| Sixth-month heroes | 18 |
| Sixth-largest in a chain, after Molokai | 39 |
| Sixth-largest continent | 23 |
| Sixth-graders, usually | 22 |
| Sixth-grader, usually | 21 |
| Sixth-grader's age, maybe | 29 |
| Sixth-grader of a 1990s cartoon series | 38 |
| Sixth-day-of-Christmas gift | 27 |
| Sixth-day creation | 18 |
| Sixth-day Christmas gift | 24 |
| Sixth-century year when the Kingdom of East Anglia was formed | 61 |
| Sixth-century year when the Armenian calendar begins | 52 |
| Sixth-century year | 18 |
| Sixth-century pope | 18 |
| Sixth-century midpoint | 22 |
| Sixth-century Great Britain settler | 35 |
| Sixth-century death year of Clovis I | 36 |
| Sixth-century date | 18 |
| Sixth-century Chinese dynasty | 29 |
| Sixth-century B.C. storyteller | 30 |
| Sixth-brightest star in the sky | 31 |
| Sixth-brightest star in a constellation | 39 |
| Sixth-brightest star | 20 |
| Sixth-anniversary material | 26 |
| Sixth, in Turin | 15 |
| Sixth, in Siena | 15 |
| Sixth, in Italy | 15 |
| Sixth _____ | 11 |
| Sixth ___ | 9 |
| Sixth __ | 8 |
| Sixth zodiac sign | 17 |
| Sixth word of the Gettysburg Address | 36 |
| Sixth word of “Moby-Dick” | 33 |
| Sixth word of "Richard III" | 37 |
| Sixth word of "A Tale of Two Cities" | 46 |
| Sixth word in the Pledge of Allegiance | 38 |
| Sixth word in the ladder | 24 |
| Sixth word in the Declaration of Independence | 45 |
| Sixth wife of Henry VIII | 24 |
| Sixth U.S. president | 20 |
| Sixth step | 10 |
| Sixth sign | 10 |
| Sixth shade | 11 |
| Sixth sense? | 12 |
| Sixth sense: Abbr. | 18 |
| Sixth sense, so to speak | 24 |
| Sixth sense, initially | 22 |
| Sixth sense, informally | 23 |
| Sixth sense, for short | 22 |
| Sixth sense, familiarly | 23 |
| Sixth sense, briefly | 20 |
| Sixth sense's rel. | 22 |
| Sixth sense letters | 19 |
| Sixth sense acronym | 19 |
| Sixth sense briefly | 20 |
| Sixth sense | 11 |
| Sixth rock from the sun: Abbr. | 30 |
| Sixth rock from the sun | 23 |
| Sixth president | 15 |
| Sixth out of six | 16 |
| Sixth of seven on the visible spectrum | 38 |
| Sixth of seven canonical hours | 30 |
| Sixth of five? | 14 |
| Sixth of an inning | 18 |
| Sixth of an inch | 16 |
| Sixth of a fluid ounce | 22 |
| Sixth of a fl. oz. | 18 |
| Sixth of a drachma | 18 |
| Sixth of 24 | 11 |
| Sixth most abundant element in the Earth's crust | 52 |
| Sixth month of the Jewish calendar | 34 |
| Sixth month of the Hebrew calendar | 34 |
| Sixth month in the Hebrew calendar | 34 |
| Sixth Man Award org. | 20 |
| Sixth letters that look like they should be last | 48 |
| Sixth letter of the Greek alphabet | 34 |
| Sixth largest plus largest planets | 34 |
| Sixth Jewish month | 18 |
| Sixth James Bond novel | 22 |
| Sixth in a series | 17 |
| Sixth in a pledge's recitation | 34 |
| Sixth hour, in Italy | 20 |
| Sixth Hebrew month | 18 |
| Sixth Hebrew letter | 19 |
| Sixth Greek letter, though it seems like it might be the last | 61 |
| Sixth Greek letter | 18 |