Crossword Genius

Twig I replanted to make things even (3,4,3,4)

Ross

I believe the answer is:

get ones own back

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

'make things even' is the definition.
(to get your own back is to get even)

'twig i replanted' is the wordplay.
I cannot quite understand how this works, but
'i' could be 'one' (Roman numeral for one) and 'one' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'to' acts as a link.

Can you help me to learn more?

(Other definitions for get ones own back that I've seen before include "even the score?" , "do like The Avengers!" .)

I've seen this clue in The Times.
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