I would enter the race this time of the week (6)

I believe the answer is:

friday

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But I can't explain it at all! Could you help me understand?

(Other definitions for friday that I've seen before include "'Robinson Crusoe' character" , "Where the weekend starts?" , "Defoe's character" , "If this day is the 13th, it's unlucky" , "Day named after a Norse goddess" .)

I've seen this clue in The Hindu.

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