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"levee" is also used as a crossword clue. If that's what you saw, the answer is often embankment (10 letters).
Definitions
an embankment that is built in order to prevent a river from overflowing
Word origin
From French levée, from lever (“to raise, rise”).
Used in a sentence
“The purchaser of a riparious estate under the words "front to the levee," does not acquire the alluvion or batture, when there is land susceptible of separate ownership beyond the levee.”
“to levee a river”
“c. 1763, Thomas Gray, letter to Mr. Nichols And look before you were up in the morning, though you were a punctual courtier at the sun's levee”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Flood-control bank”5 letters
02“Riverbank barrier”5 letters
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