Today's OED antedating: "To not have a clue"

To not have a clue, figurative, to be oblivious ("clue," n., sec 2 (e), first use cited 1924): Poem titled "Clearing Up a Mystery," by pseudonymous "Morrie," aka Morrie Ryskind, New York Tribune, November 4, 1916, p 11, col 1: "But why he smote he didn’t note,/Which shows he is a careless pote—/Or never knew, nor had a clew."