| Answer | Crossword Clue |
|---|---|
| SPAM | E-mail filter filler |
| SPAM | E-mail filter target |
| SPAM | Stuff caught in an e-mail filter |
| SPAM | E-mail in-box filler |
| GROUNDS | Coffee-filter filler |
| DRIPGRINDCOFFEE | Brewer's filter filler |
| kieselguhr | A form of diatomaceous earth used in various manufacturing and laboratory processes, chiefly as a filter, filler, or insulator |
