If wrong again, she’s probably French (4)

'if wrong again she's probably french' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'if wrong again she's probably french' is the wordplay.
I cannot really see how this works, but
'if' is present in the answer.
'french' could be 'f' and 'f' is present in the answer.
A single letter 'i' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?