From French victory, time makes an art (9)

I believe the answer is:

decoupage

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'an art' is the definition.
(I know that decoupage is a type of art)

'from french victory time' is the wordplay.
'from french' becomes 'de' ('from' in French).
'victory' becomes 'coup' (I can't explain this - if you can you should give a lot more credence to this answer).
'time' becomes 'age' (an age is a period of time).
'de'+'coup'+'age'='DECOUPAGE'

'makes' is the link.

Can you help me to learn more?

(Another definition for decoupage that I've seen is " paperwork, perhaps".)

I've seen this clue in The Daily Express.

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