Crossword Genius

Wherein life has no ups and downs? (5)

Ross

I believe the answer is:

flats

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

'downs?' is the definition.
(thesaurus)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for flats that I've seen before include "As opposed to sharps?" , "Punctures" , "Apartments" .)

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.