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"exotic" is also used as a crossword clue. If that's what you saw, the answer is often alien (5 letters).
Definitions
strikingly strange or unusual
Word origin
Borrowed from Middle French exotique, from Latin exōticus, from Ancient Greek ἐξωτικός (exōtikós, “foreign”, literally “from the outside”), from ἐξω- (exō-, “outside”), from ἐξ (ex, “out of”).
Used in a sentence
“an exotic appearance”
“Nothing was so splendid and exotic as the ambassador.”
“exotic materials”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Unusual and foreign”6 letters
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