One blow to the French, two to us (6)

I believe the answer is:

couple

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'two to us' is the definition.
I can't judge whether this definition defines the answer.

'one blow to the french' is the wordplay.
'one blow' becomes 'coup' (I can't explain this - if you can you should believe this answer much more).
'to the french' becomes 'le' ('the' in French).
'coup'+'le'='COUPLE'

Can you help me to learn more?

(Other definitions for couple that I've seen before include "Twosome" , "Link together - say two married people" , "Unite" , "Pair, duo" , "Bonnie and Clyde, say" .)

I've seen this clue in the Evening Standard.

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