Crossword Genius

Correspondence regularly rejected by soviet cadre? (5)

Ross

I believe the answer is:

ratio

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

'correspondence' is the definition.
(thesaurus)

'regularly rejected by soviet cadre?' is the wordplay.
I cannot really see how this works, but
'by' could be 'at' and 'at' is found in the answer.
The remaining letters 'rio' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for ratio that I've seen before include "One to one - maybe" , "Mathematical relation of one thing to another" , "Proportional measure" , "Relationship of numbers" , "Relative magnitude" .)

I've seen this clue in The Hindu.
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.