| Answer | Crossword Clue |
|---|---|
| OILCAKE | By-product of flaxseed. |
| COKE | By-product of coal. |
| SOOT | By-product of smoke. |
| ETHANE | By-product of oil refining |
| AREA | Product of length by breadth. |
| FUSEL | By-product of bad liquor. |
| BRAN | By-product of grain processing. |
| PLANTERSPEANUTS | Product whose logo was designed by a Virginia schoolboy as part of a contest |
