| Answer | Crossword Clue |
|---|---|
| THINNER | Additive to paint. |
| TONER | Paint additive |
| THINNER | Paint additive |
| DRIER | Paint additive |
| HARDENER | Paint additive for a firmer finish |
| CREAM | Additive to coffee |
| ALOE | Additive to some tissues |
| ALOE | Additive to shampoo and shaving cream |
| EXTENDER | Additive to increase volume or bulk |
| NACL | Most common food additive, to a chemist |
| SAGE | Common additive to melted butter in Italian cuisine |
| ARSENIC | Lethal additive to elderberry wine, in a Kesselring black comedy |
