| Source of rare metals, maybe | 28 |
| Source of quotes, for short | 27 |
| Source of quick cash, briefly | 29 |
| Source of profitable success | 28 |
| Source of pricey peanuts | 24 |
| Source of pressure, perhaps | 27 |
| Source of pressure, often | 25 |
| Source of pressure, maybe | 25 |
| Source of pressure, at times | 28 |
| Source of potent buttons | 24 |
| Source of possible harm | 23 |
| Source of political support | 27 |
| Source of pink applesauce | 25 |
| Source of pigs' knuckles? | 29 |
| Source of perspiration | 22 |
| Source of patronage jobs | 24 |
| Source of Pará rubber | 24 |
| Source of paper tigers | 22 |
| Source of paper profits? | 24 |
| Source of overhead mews | 23 |
| Source of ornamental plumes | 27 |
| Source of orange-red light | 26 |
| Source of oil and food | 22 |
| Source of oater drumming | 24 |
| Source of nuclear energy | 24 |
| Source of northern exposure? | 28 |
| Source of net receipts | 22 |
| Source of needed dough | 22 |
| Source of natural light | 23 |
| Source of much tea from Asia | 28 |
| Source of much salon noise | 26 |
| Source of much legalese | 23 |
| Source of much Indian tea | 25 |
| Source of much hard wood? | 25 |
| Source of much dorm furniture | 29 |
| Source of much blonde hair | 26 |
| Source of much bell-ringing | 27 |
| Source of mother-of-pearl | 25 |
| Source of moos or baas | 22 |
| Source of modern music | 22 |
| Source of mints, at times | 25 |
| Source of milk for chèvre | 28 |
| Source of martini additives | 27 |
| Source of many troubles | 23 |
| Source of many tiny animals | 27 |
| Source of many old pop songs | 28 |
| Source of many news items | 25 |
| Source of many memories | 23 |
| Source of many dialogues | 24 |
| Source of lysergic acid | 23 |
| Source of low-fat meat | 22 |
| Source of low-alcohol wines | 27 |
| Source of low pitches? | 22 |
| Source of local information | 27 |
| Source of legal precedents | 26 |
| Source of legal precedent | 25 |
| Source of lean red meat | 23 |
| Source of Italian bubbly | 24 |
| Source of iron or lead | 22 |
| Source of iridescent buttons | 28 |
| Source of invigoration | 22 |
| Source of investor angst | 24 |
| Source of Interstate info | 25 |
| Source of internal dialog? | 26 |
| Source of interference | 22 |
| Source of intelligence: Abbr. | 29 |
| Source of inside information? | 29 |
| Source of inside information | 28 |
| Source of inside info? | 22 |
| Source of inner clarity? | 24 |
| Source of Indian black tea | 26 |
| Source of income or outgo | 25 |
| Source of income for some | 25 |
| Source of illumination | 22 |
| Source of illicit money | 23 |
| Source of illegitimate income | 29 |
| Source of illegal boarders | 26 |
| Source of ill-gotten gains | 26 |
| Source of igneous rocks | 23 |
| Source of igneous rock | 22 |
| Source of hypoallergenic wool | 29 |
| Source of horse racing info | 27 |
| Source of homey wisdom | 22 |
| Source of high anxiety? | 23 |
| Source of heavy timber wood | 27 |
| Source of hash, slangily | 24 |
| Source of ground chuck | 22 |
| Source of great wealth | 22 |
| Source of great profit | 22 |
| Source of gray hairs, maybe | 27 |
| Source of grand sounds? | 23 |
| Source of graft funds? | 22 |
| Source of grade inflation | 25 |
| Source of government revenue | 28 |
| Source of gov't loans | 25 |
| Source of gold for Solomon | 26 |
| Source of global warming | 24 |
| Source of funds for srs. | 24 |
| Source of funding for the BBC | 29 |
| Source of fries, slangily | 25 |