| Answer | Crossword Clue |
|---|---|
| OSAGE | Missouri River's largest tributary |
| OHIO | Mississippi River's largest tributary |
| OSAGE | Largest tributary of the Missouri |
| IOWA | It's between the Mississippi and Missouri Rivers |
| OSAGE | Missouri tributary. |
| OSAGE | Missouri tributary |
| PLATTE | Missouri tributary |
| PLATTE | Missouri tributary. |
| PLATTE | Missouri River tributary. |
| OSAGE | Missouri River tributary |
| PLATTE | Missouri River tributary |
| PLATTE | Tributary of the Missouri |
| OSAGE | Tributary of the Missouri. |
| OSAGE | Tributary of the Missouri |
| PLATTE | Tributary of the Missouri. |
| OSAGE | Tributary of the Missouri River |
| OSAGE | Major tributary of the Missouri |
| OSAGE | A tributary of the Missouri |
| OSAGE | Tributary on the Missouri River |
| OSAGE | 500-mile tributary of the Missouri. |
