Minceur is valid Scrabble Word

Is minceur a scrabble word?
Official Scrabble Players Dictionary NO
Official Tournament and Club Word List NO
Collins Scrabble Words YES
Is minceur valid Words with Friends?
Words with Friends NO

Definitions for MINCEUR in dictionary:

Find what other words can be done using letters: "minceur"
https://scrabble-word.com/finder/minceur
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