Crossword Genius

Piece of rabbit that a couple will share? (3-2-3)

Ross

I believe the answer is:

one-to-one

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

'couple will share?' is the definition.
The definition and answer are not the same part of speech.

'piece of rabbit that a' is the wordplay.
I cannot quite understand how this works, but
'piece' could be 'n' (abbreviation for Knight in chess notation) and 'n' is found in the answer.
'of' could be 'o' and 'o' is present in the answer.
'a' could be 'one' and 'one' is located in the answer.
The remaining letters 'eto' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for one-to-one that I've seen before include "Corresponding uniquely, each to another" , "meeting?" , "T?te-?-t?te" , "12:59" .)

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