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"refined" is also used as a crossword clue. If that's what you saw, the answer is often sophisticated (13 letters).
Definitions
suggesting taste, ease, and wealth
Used in a sentence
“The raw petroleum was refined into kerosene.”
“The argument, while not persuasive, is quite refined.”
“The curriculum has been carefully refined to meet the needs of foreign students.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Polished”7 letters
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