Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Clean

Clean as a die.
—Anonymous

Clean as a Dutch oven.
—Anonymous

Clean as a new pin.
—Anonymous

Clean as a pebble.
—Anonymous

Clean as crystal.
—Anonymous

Clean as light.
—Anonymous

Cleaner than our sister the water.
—Anonymous

Clean as virgin silver.
—Arabian Nights

Clean as sifted corn.
—Aristophanes

As clean as a Flemish interior.
—Honoré de Balzac

Clean as a maiden’s honor.
—Björnstjerne Björnson

Clean as a whistle.
—John Byrom

Clean as a [new] penny.
—John Gay

Clean as a beaver.
—Bret Harte

Clean as a maid from guile and fleshy sin.
—Robert Stephen Hawker

Clean,
As if o’erwashed with Hippocrene.
—Robert Herrick

Clean as running water in a cress-fringed brook.
—Edwin Leibfreed

Clean as a red-hot poker.
—George Meredith

Clean as the bright from the black.
—George Meredith

His work is as clean as silver lace.
—Osmanli Proverb

As clean as a leek.
—Scottish Proverb

Clean as a rose is after rain.
—James Whitcomb Riley

Clean as a hound’s tooth.
—Theodore Roosevelt

Clean as a sound sheep’s heart.
—William Shakespeare

Clean as a sponge wipes a chalk problem from a blackboard.
—J. Russell Smith

Clean of cloud
As though day’s heart were proud
And heaven’s were glad.
—Algernon Charles Swinburne

Clean as blood of babes.
—Alfred Tennyson

Clean as the carving knife chops the carrot.
—William Makepeace Thackeray