What does filtering mean in crosswords?

filtering means: Passing through a filter or selecting out.

Which crossword clues can have filtering as the answer?

Possible clues for filtering include "Strain process".

Word entry · 9 letters

Best crossword clue

"Strain process"

9 letters · collected on this word page

9 lettersSorted efgiilnrtStarts with FEnds with G1 cluesCommon crossword word

1F2I3L4T5E6R7I8N9G

Source: Wiktionary, CC BY-SA 4.0

01“Strain process”9 letters

Not quite right?

F________