"Practice makes perfect" or "Haste makes waste" (5)

I believe the answer is:

axiom

(Other definitions for axiom that I've seen before include "Maxim - truism" , "Old saying or precept 95)" , "Proposition assumed to be self-evident" , "Truth assumed to be self-evident" , "Maxim, self-evident truth" .)

I've seen this clue in The New York Times.

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