Crossword Genius

Most definitely gone and done wrong instead? (5,4)

Ross

I believe the answer is:

stone-dead

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

'most definitely gone' is the definition.

'done wrong instead?' is the wordplay.
I cannot quite see how this works, but
an anagram of 'done' is 'oned' which is within the answer.
The remaining letters 'stead' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'and' is the link.

Can you help me to learn more?

(Other definitions for stone-dead that I've seen before include "Lifeless (as a rock?)" , "Completely lifeless" .)

I've seen this clue in The Guardian.
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