Crossword Genius

Completely prone to face this way? (4,2,3,6)

Ross

I believe the answer is:

down to the ground

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

'completely' is the definition.
(I've seen this before)

'prone to face this way?' is the wordplay.
I cannot really understand how this works, but
'to' is within the answer.
'way?' could be 'w' (Compass direction - West) and 'w' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for down to the ground that I've seen before include "Where rain goes" , "So well suited" , "Absolutely!" , "it's the responsibility of the Oval, for example" , "In every respect" .)

I've seen this clue in The Guardian.
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