Crossword Genius

Clearly not mountainous (7)

Ross

I believe the answer is:

plainly

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

'clearly' is the definition.
(synonyms)

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

Can you help me to learn more?

(Other definitions for plainly that I've seen before include "Clearly" , "In unconcealed fashion" , "obviously" , "Simply" , "... without embellishment" .)

I've seen this clue in the Evening Standard.
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.