Vindicates - the meteorologist's forecast of improving weather? (6)

I believe the answer is:

clears

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

'vindicates' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their -s form.
Maybe you can see a link between them that I don't see?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for clears that I've seen before include "Empties" , "Exonerates" .)

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.