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"alfalfa" is also used as a crossword clue. If that's what you saw, the answer is often lucerne (7 letters).
Definitions
leguminous plant grown for hay or forage
Word origin
From Spanish alfalfa, from Old Spanish alfalfez, from Arabic الْفَصْفَصَة (al-faṣfaṣa, “alfalfa, lucerne”).
Used in a sentence
““No place for rabbits now, but I could easy build a few hutches and you could feed alfalfa to the rabbits.””
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Hay-field legume”7 letters
02“Hay crop”7 letters
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