In current unit, mother back? Father in France? (6)
I believe the answer is:
ampere
'in current unit' is the definition.
'ampere' can be an answer for 'unit' (ampere is a kind of unit). I am unsure of the 'in current' bit.
'mother back? father in france?' is the wordplay.
'mother' becomes 'ma' (Ma is another word for mother or mum).
'back?' says the letters should be written backwards (I've seen 'back' mean this).
'father in france?' becomes 'pere' (French for 'father').
'ma' backwards is 'am'.
'am'+'pere'='AMPERE'
Can you help me to learn more?
(Other definitions for ampere that I've seen before include "Current measure" , "scientist" , "Unit of electrical current" , "Unit measured by 17 across" , "Unit of currency" .)