Crossword Genius

Drives at happy mediums (5)

Ross

I believe the answer is:

means

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

This clue might be a double definition.

'drives' is the first definition.
The answer and definition can be both to do with communicating as well as being verbs in their -s form.
Perhaps you can see an association between them that I don't see?

'happy mediums' is the second definition.
Although both the answer and definition are plural nouns, I can't see how one could define the other.

'at' acts as a link.

Can you help me to learn more?

(Other definitions for means that I've seen before include "Pecuniary resources" , "Intends - capital" , "has significance" , "Signifies" , "considerable income" .)

I've seen this clue in the Sydney Morning Herald.
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