One in France, it is one (4)
I believe the answer is:
unit
This might be a double definition.
'one in france' is the first definition.
'unit' can be an answer for 'one' ('unit' can be a synonym of 'one'). I am not sure about the 'in france' bit.
'it is one' is the second definition.
('unit' can be a synonym of 'one')
Can you help me to learn more?
(Other definitions for unit that I've seen before include "Single item; one" , "Single manufactured item; military grouping" , "Item combining separate parts" , "Some fighting men" , "Single person - group of people" .)