English translation of the French word "mardi” (7)

I believe the answer is:

tuesday

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'english' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for tuesday that I've seen before include "early in the week" , "Weekday" , "24-hour period" , "Ruby - (The Rolling Stones)" , "Wed after this" .)

I've seen this clue in The Times.

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