In France, current ruler ultimately perfect? (5)

I believe the answer is:

rhone

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'in france current' is the definition.
'rhone' can be an answer for 'current' (I've seen this before). I am not sure about the 'in france' bit.

'ruler ultimately perfect?' is the wordplay.
'ultimately' suggests the final letters.
'perfect?' becomes 'hone' ('hone' can be a synonym of 'perfect').
The last letter of 'ruler' is 'r'.
'r'+'hone'='RHONE'

Can you help me to learn more?

(Other definitions for rhone that I've seen before include "French flower" , "Major French river, rising in Switzerland" , "Swiss-French river" , "Camargue river" , "wine-producing area" .)

I've seen this clue in The Times.

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