not have a clue

Idioms & Phrases

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.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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