| Rating | Solver | Clue |
|---|---|---|
| ROOT | Source | |
| DERIVATION | Source | |
| ORIGIN | Source | |
| OIL LAMP | Light source | |
| OYSTERSHELL | Mother-of-pearl source | |
| SUN | Light/heat source | |
| TRUSTWORTHY | Credible (source) | |
| TREE | Timber source | |
| BATTERY | Electricity source | |
| PALM | Oil source | |
| OPIUM | Morphine source | |
| SUGARBEET | Sweetener source | |
| SUGARCANE | Sweetener source | |
| RAINCLOUD | Precipitation source | |
| OILWELL | Petroleum source | |
| FUND | Monetary source | |
| CIGARETTE | Nicotine source | |
| BOG | Sphagnum source | |
| SUET | Tallow source | |
| ROOTSTOCK | Primary source | |
| SESAME | Oil source | |
| SOYA | Tofu source | |
| LAMP | Light source | |
| GOAT | Milk source | |
| TEAT | Milk source | |