Clotter is valid Scrabble Word

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

Definitions for CLOTTER in dictionary:

Words related to CLOTTER

clottered12 clottering13 clotters10
Find what other words can be done using letters: "clotter"
https://scrabble-word.com/finder/clotter
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