| 100% | LORAX | 5 | Dr. Seuss character that "speaks for the trees" |
| 91% | LORAX | 5 | Dr. Seuss character who speaks for the trees |
| 83% | LORAX | 5 | Dr. Seuss character who speaks "for the trees" |
| 83% | LORAX | 5 | Dr. Seuss character who "speaks for the trees" |
| 75% | LORAX | 5 | Dr. Seuss character who says "I speak for the trees" |
| 75% | LORAX | 5 | Dr. Seuss character who speaks for the 5-Downs |
| 75% | LORAX | 5 | "I speak for the trees" Seuss character |
| 71% | LORAX | 5 | Seuss character who "speaks for the trees" |
| 66% | LORAX | 5 | Seuss character who “speaks for the trees” |
| 59% | THELORAX | 8 | Title Seuss character who speaks for trees |
| 53% | THELORAX | 8 | 31-Across environmental title character who speaks for the trees (2 wds.) |
| 53% | LORAX | 5 | "I speak for the trees" speaker |
| 52% | LORAX | 5 | Kid-lit character who "speaks for the trees" |
| 52% | GRINCH | 6 | The ___, Dr. Seuss' fictional character from Whoville that despises Christmas and steals from homes |
| 49% | LORAX | 5 | "I speak for the trees, for the trees have no tongues" speaker |
| 47% | THELORAX | 8 | Dr. Seuss book about an eco-conscious creature who "speaks for the trees": 2 wds. |
| 47% | LORAX | 5 | Dr. Seuss character who confronts the Once-ler |
| 46% | LORAX | 5 | Dr. Seuss character who tried to protect Truffula trees |
| 46% | YERTLE | 6 | Dr. Seuss character who becomes "King of the Mud" |
| 45% | HOP | 3 | "___ on Pop," 1963 book by Dr. Seuss that ranked sixteenth on Publisher Weekly's list which is one of the best-selling books for children |
| 45% | THELORAX | 8 | Dr. Seuss book about caring for the environment |
| 44% | ONCELER | 7 | The Lorax character that cuts down Truffula trees |
| 43% | TIL | 3 | Alternate name for the stinkwood tree that grows in the Canary Islands |
| 43% | TERROIR | 7 | French-derived term for the regional factors that give a wine its character |
| 42% | OCAPTAINMYCAPTAIN | 17 | 1865 classic not written for the characters that start the answers to starred clues |
| 41% | ELEGIZE | 7 | Speak for the dead |
| 41% | ELMTREE | 7 | A tree that is the state symbol for Massachusetts: 2 wds. |
| 41% | AGE | 3 | Figure that rapidly increases for some of the characters in Old |
| 40% | HOP | 3 | With 36-Down, Dr. Seuss classic with the subtitle "The Simplest Seuss for Youngest Use" |
| 40% | ORATE | 5 | Speak for the Congressional Record, say |