clean as a whistle

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clean as a whistle (not comparable)

1. (simile, idiomatic) Very clean.

   Synonyms: clean as a bean, clean as a hound's tooth, clean as a new penny, clean as a new pin; see also Thesaurus:clean

2. (simile, idiomatic) Completely innocent; beyond moral reproach.

   Synonyms: clean-handed, clean as a hound's tooth; see also Thesaurus:innocent

• clear as a bell