Is this your crossword clue?
"surprisingly" is also used as a crossword clue. If that's what you saw, the answer is often remarkably (10 letters).
Definitions
in a surprising manner
Word origin
From surprising + -ly.
Used in a sentence
“Near-synonyms: unexpectedly, unusually”
“The house was surprisingly small for such a numerous family.”
“Not surprisingly, the electrician didn't come at the time he had said.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Unexpectedly”12 letters
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