Doesn't stand for untruths (4)

I believe the answer is:

lies

I'm a little stuck... Click here to teach me more about this clue!

'untruths' is the definition.
(lie is a kind of untruth)

I don't understand how the rest of the clue works.

(Other definitions for lies that I've seen before include "Assumes a horizontal position" , "Deceits; is" , "Wallows" , "Falsehood" , "False statements" .)

I've seen this clue in The Mirror.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.