Frenchman taking in French south upset ultimate consumer? (3,4)
I believe the answer is:
end user
'ultimate consumer?' is the definition.
(I've seen this in another clue)
'frenchman taking in french south upset' is the wordplay.
'frenchman' becomes 'rene' (common French name).
'taking in' means one lot of letters goes inside another.
'french south' becomes 'sud' ('south' in French).
'upset' says the letters should be written backwards.
'rene' placed around 'sud' is 'resudne'.
'resudne' written backwards gives 'END-USER'.
(Other definitions for end user that I've seen before include "One getting the ultimate enjoyment" , "Being last to receive goods" , "last link in the chain" , "Ultimate recipient of goods" , "Final recipient of product" .)