Known to be effective WSJ Crossword Clue

By Date: OCT 15, 2025 Follow on Google

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The most common and recent 6-letter answer for "Known to be effective" is TESTED.
The clue 'Known to be effective' suggests something that has been tried and proven to work. 'TESTED' implies that the effectiveness of something has been verified through trials or experiments.
This clue was last seen in the WSJ Crossword on October 15, 2025.
TESTED means having undergone trials to determine effectiveness or reliability.
Tried-and-true, No longer green, Tried out

The clue “Known to be effective” is a classic crossword staple, frequently appearing in puzzles like the WSJ crossword. For the puzzle dated October 15 2025, the definitive 6-letter answer is: TESTED.

Expert Tip: When you’re stuck, try to analyze the structure of the clue itself. Is it a direct definition, a pun, a fill-in-the-blank, or a pop culture reference? Identifying the type of clue you’re dealing with is a key skill for improving your solving speed.

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