| Source of current buzz | 22 |
| Source of current events? | 25 |
| Source of D.C. funding | 22 |
| Source of dates, for some | 25 |
| Source of dietary fiber | 23 |
| Source of dietary sodium | 24 |
| Source of direct access | 23 |
| Source of DNA evidence, often | 29 |
| Source of dog distress | 22 |
| Source of downloadable tunes | 28 |
| Source of dragon fruit | 22 |
| Source of durable wood | 22 |
| Source of durable wood? | 23 |
| Source of DVD warnings | 22 |
| Source of eco-friendly ink | 26 |
| Source of embarrassment | 23 |
| Source of emergency funds | 25 |
| Source of endless funds | 23 |
| Source of enlightenment | 23 |
| Source of ergot poisoning | 25 |
| Source of erratic shots? | 24 |
| Source of ethnic pride | 22 |
| Source of Eve's creation | 28 |
| Source of Eve's leaves | 26 |
| Source of exasperation | 22 |
| Source of excellent caviar | 26 |
| Source of extra lean meat | 25 |
| Source of extra-large eggs | 26 |
| Source of false returns | 23 |
| Source of family traits | 23 |
| Source of fast-acting carbs | 27 |
| Source of firm information | 26 |
| Source of Flash animation? | 26 |
| Source of flowing water | 23 |
| Source of fragrant wood | 23 |
| Source of French fries | 22 |
| Source of French Riviera heat | 29 |
| Source of fries, slangily | 25 |
| Source of funding for the BBC | 29 |
| Source of funds for srs. | 24 |
| Source of global warming | 24 |
| Source of gold for Solomon | 26 |
| Source of gov't loans | 25 |
| Source of government revenue | 28 |
| Source of grade inflation | 25 |
| Source of graft funds? | 22 |
| Source of grand sounds? | 23 |
| Source of gray hairs, maybe | 27 |
| Source of great profit | 22 |
| Source of great wealth | 22 |
| Source of ground chuck | 22 |
| Source of hash, slangily | 24 |
| Source of heavy timber wood | 27 |
| Source of high anxiety? | 23 |
| Source of homey wisdom | 22 |
| Source of horse racing info | 27 |
| Source of hypoallergenic wool | 29 |
| Source of igneous rock | 22 |
| Source of igneous rocks | 23 |
| Source of ill-gotten gains | 26 |
| Source of illegal boarders | 26 |
| Source of illegitimate income | 29 |
| Source of illicit money | 23 |
| Source of illumination | 22 |
| Source of income for some | 25 |
| Source of income or outgo | 25 |
| Source of Indian black tea | 26 |
| Source of inner clarity? | 24 |
| Source of inside info? | 22 |
| Source of inside information | 28 |
| Source of inside information? | 29 |
| Source of intelligence: Abbr. | 29 |
| Source of interference | 22 |
| Source of internal dialog? | 26 |
| Source of Interstate info | 25 |
| Source of investor angst | 24 |
| Source of invigoration | 22 |
| Source of iridescent buttons | 28 |
| Source of iron or lead | 22 |
| Source of Italian bubbly | 24 |
| Source of lean red meat | 23 |
| Source of legal precedent | 25 |
| Source of legal precedents | 26 |
| Source of local information | 27 |
| Source of low pitches? | 22 |
| Source of low-alcohol wines | 27 |
| Source of low-fat meat | 22 |
| Source of lysergic acid | 23 |
| Source of many dialogues | 24 |
| Source of many memories | 23 |
| Source of many news items | 25 |
| Source of many old pop songs | 28 |
| Source of many tiny animals | 27 |
| Source of many troubles | 23 |
| Source of martini additives | 27 |
| Source of milk for chèvre | 28 |
| Source of mints, at times | 25 |
| Source of modern music | 22 |
| Source of moos or baas | 22 |
| Source of mother-of-pearl | 25 |