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Tip: Use ? for unknown answer letters, e.g. AN??ER. Use the space bar to enter ? quickly.
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Clue: "Efficacy"
"Efficacy" is a New York Times crossword puzzle clue that we have seen 1 time.
Possible answer
AVAIL
Likely related crossword puzzle clues
Use
Help
Serve
Profit
Benefit
Purpose
To no ___
Be handy
Advantage
Be of use
Be useful
Make use of
Be of use to
Be useful to
Prove useful
Show more
Recent usage in crossword puzzles
New York Times -
May 27, 2000