Crossword Genius

Runs from disagreement? That’s a lie (7)

Ross

I believe the answer is:

fiction

'that's a lie' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for fiction that I've seen before include "Non-factual story" , "Imaginary prose" , "Fabricated story" , "Invented story" , "Something invented" .)

I've seen this clue in The Times.
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