| Answer | Crossword Clue |
|---|---|
| PERCOLATE | Filter, as coffee |
| PERK | Filter through, as coffee. |
| GROUNDSKEEPER | Coffee filter? |
| GROUNDS | Coffee-filter filler |
| BALEEN | Substance used by whales as a feeding filter |
| ultrafilter | an extremely fine filter which retains particles as fine as large molecules / to pass through an ultrafilter |
| kieselguhr | A form of diatomaceous earth used in various manufacturing and laboratory processes, chiefly as a filter, filler, or insulator |
