не иметь ни малейшего понятия(of sth. • The trip was meant to be a fun late summer excursion before the start of the coming school year, and as they happily set up camp, no one would have had the slightest clue of the strange circumstances that were about to unfold. (mysteriousuniverse.org) -- никто не имел ни малейшего понятияART Vancouver)
ни малейшего намёка(на – of • "You don't think he spoke laughingly?" "No, I do not think he spoke laughingly." "With a twinkle in his eye, I mean?" "There was not the slightest suggestion of any twinkle in his eye." (P.G. Wodehouse)ART Vancouver)