Crossword Genius

In an unbiased way, reported unprotected pit, potentially fatal (4-8)

Ross

I believe the answer is:

open-mindedly

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'in' is the definition.
Both the answer and definition are adverbs.
Maybe there's an association between them I don't understand?

I cannot understand how the remainder of the clue works.

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(Another definition for open-mindedly that I've seen is " So as to show no preconceptions".)

I've seen this clue in The Irish Times.
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