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"fairy" is also used as a crossword clue. If that's what you saw, the answer is often fay (3 letters).
Definitions
a small being, human in form, playful and having magical powers
Used in a sentence
“These he knew by their fiery eyes, and knew that he was at last in the land of Fairy.”
“"They used to say there were fairies in that hill, I must tell you!"”
“"When are we going to see this fairy?" demanded Algy. "You, personally, never. You're far too immoral. I might let the others look at her from a distance in a year or two."”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Tiny magical creature”5 letters
02“Tiny magical being”5 letters
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