Is this your crossword clue?
"uninformed" is also used as a crossword clue. If that's what you saw, the answer is often ignorant (8 letters).
Definitions
not informed; lacking in knowledge or information
Word origin
From un- + informed.
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Not briefed”10 letters
02“Not in the know”10 letters
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U_________