Crossword Genius

Fed up? Power to partner? (2,5)

Ross

I believe the answer is:

de facto

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

'fed up? power to partner?' is the definition.
I can't tell whether this definition defines the answer.

'fed up? power to' is the wordplay.
'up?' says the letters should be written in reverse (in down clue: letters go upwards).
'power' becomes 'ac' (AC is an example).
'fed' written backwards gives 'def'.
'def'+'ac'+'to'='DE FACTO'

Can you help me to learn more?

(Other definitions for de facto that I've seen before include "actually" , "effective" , "Really" , "In practice" , "In reality, actual" .)

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