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Phrase(s): start (over) with a clean slate
Go to start (off) with a clean slate., Phrase(s): start (off) with a clean slate [and] start (over) with a clean slate
Fig. to start out again afresh; to ignore the past and start over again. • I plowed under all last year’s flowers so I could start with a clean slate next spring. • If I start off with a clean slate, then I’ll know exactly what each plant is. • When Bob got out of jail, he started over with a clean slate.
McGrawhill's American Idioms And Phrasal Verbs