Takes out ads - first is one in French (7)

I believe the answer is:

unplugs

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'takes out' is the definition.
(I've seen this before)

'ads first is one in french' is the wordplay.
'ads' becomes 'plugs' (I can't justify this - if you can you should believe this answer much more).
'first' means one lot of letters go next to another.
'is one in french' becomes 'un'.
'plugs' after 'un' is 'UNPLUGS'.

Can you help me to learn more?

(Another definition for unplugs that I've seen is " Takes out".)

I've seen this clue in The Telegraph.

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