not have a clue

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not have a clue

To know absolutely (nothing about something). My brother thinks he can maintain his social life after he has kids. He hasn't got a clue! You don't have a clue how that thing works, do you?
See also: clue, have, not

have a clue (about something)

Fig. to know anything about something; to have even a hint about someone or something. (Usually negative.) I don't have a clue about where to start looking for Jim. Why do you think I have a clue about Tom's disappearance?
See also: clue, have

not have a clue

Have no idea or inkling about something, as in Jane doesn't have a clue as to why John won't call her, or Do you know what's wrong with the boiler?-No, I haven't a clue. This usage was first recorded in 1928.
See also: clue, have, not

not have a clue

INFORMAL
COMMON If you do not have a clue about something, you do not know anything about it or you have no idea what to do about it. When I met my wife she didn't have any clue about cricket. Nobody has a clue where he's gone. I don't have a clue what I'm supposed to be doing.
See also: clue, have, not
References in classic literature ?
Thus Hester Prynne, whose heart had lost its regular and healthy throb, wandered without a clue in the dark labyrinth of mind; now turned aside by an insurmountable precipice; now starting back from a deep chasm.
However, if one designs to construct a dwelling-house, it behooves him to exercise a little Yankee shrewdness, lest after all he find himself in a workhouse, a labyrinth without a clue, a museum, an almshouse, a prison, or a splendid mausoleum instead.
A completeness without a clue, and a stealthy silence as of a neatly executed crime, characterise this murderous disaster, which, as you may remem- ber, had its gruesome celebrity.