Inappropriate French article and a couple from Italy (5)

I believe the answer is:

undue

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'inappropriate' is the definition.
(similar in meaning)

'french article and a couple from italy' is the wordplay.
'french article' becomes 'un' (indefinite article in French).
'and' means one lot of letters go next to another.
'a couple from italy' becomes 'due' (I can't explain this - if you can you should believe this answer much more).
'un'+'due'='UNDUE'

Can you help me to learn more?

(Other definitions for undue that I've seen before include "Extreme" , "Lacking justification" , "Excessive - unwarranted" , "Needless; excessive" , "Not warranted" .)

I've seen this clue in The Times.

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