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"informative" is also used as a crossword clue. If that's what you saw, the answer is often enlightening (12 letters).
Definitions
providing or conveying information
Word origin
From inform + -ative.
Used in a sentence
“I read a very informative newspaper article on that subject last week.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“fact-filled”11 letters
02“Full of facts”11 letters
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