| 100% | SUN | 3 | The biggest natural source of light for us |
| 49% | SUN | 3 | Natural source of light |
| 47% | SUN | 3 | Natural source of light and vitamin D |
| 47% | TOWN | 4 | "This ___ ain't big enough for the both of us" |
| 45% | SCOOTIN | 7 | “Move over—this side of the booth is big enough for both of us” |
| 44% | SUN | 3 | Source of natural light |
| 42% | SUN | 3 | Source of energy for all of us |
| 42% | UBOAT | 5 | Source of doom for the 17-Across |
| 42% | EWE | 3 | Source of the milk for Romano cheese |
| 42% | GOAT | 4 | Source of the milk for chèvre cheese |
| 42% | EREADER | 7 | Source of books adapted for the screen |
| 42% | PHONE | 5 | Source of a light in the darkness, perhaps |
| 42% | EWE | 3 | Source of the milk for pecorino Romano cheese |
| 42% | ALPACA | 6 | Source of the robe material for Incan royalty |
| 41% | OPEC | 4 | Source of some of the oil for 31-Down |
| 41% | ABBA | 4 | Source of the music for a 2001 theatrical hit |
| 41% | YEATS | 5 | Source of the title "No Country for Old Men" |
| 41% | SUN | 3 | Light source for the Earth |
| 41% | ASIA | 4 | Source of a big percentage of U.S. auto imports |
| 41% | SNL | 3 | Source of ads for Baby Spanx and the Love Toilet |
| 41% | EUR | 3 | Source of much early immigration to the U.S.: Abbr. |
| 41% | IRE | 3 | Source of much U.S. immigration in the 1840s: Abbr. |
| 40% | HUGE | 4 | Bigger than the both of us |
| 40% | AENEID | 6 | Source of the line "Each of us bears his own Hell" |
| 40% | SUPERBOWL | 9 | __ Sunday, the biggest US sports day of the year |
| 40% | SNAP | 4 | Largest source of food benefits in the U.S. |
| 40% | DEFENSESPENDING | 15 | Big chunk of the U.S. budget |
| 39% | PORTLAND | 8 | Biggest city in the US state of Maine |
| 39% | EDISON | 6 | US inventor of the phonograph and light bulb |
| 39% | BEN | 3 | Big ___, nickname for the Great Bell of London |