Yes, clean is playable
...and is worth 10 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Clean" Definition
noun
An act of dirt especially from the surface of something.
phrasal-verb
Clean out Informal To drive or force out: cleaned out the incompetent workers.
Clean out Slang To deprive completely of money or material wealth: The robbery cleaned us out.
Clean out To empty of contents or occupants.
Clean out To rid of dirt, rubbish, or impurities.
Clean up Slang To make a large profit, often in a short period of time: cleaned up during the bull market.
adverb
In a clean or nonpolluting manner: a fuel that burns clean.
In a fair manner: played the game clean.
Informal Entirely; wholly: clean forgot the appointment.
So as to be unsoiled: wash the dishes clean.
verb-transitive
Sports To lift (a barbell) from the floor to the shoulders in one motion.
To get rid of (impurities or dirt, for example); remove: cleaned up the trash; cleaned off the stains.
To prepare (fowl or other food) for cooking, as by removing the entrails or fat.
To remove the contents from; empty: cleaned my plate.
To rid of dirt, rubbish, or impurities: clean a room; clean a suit.
verb-intransitive
To undergo or perform an act of cleaning.
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