1clue 
/ˈklu:/ noun
plural clues /ˈklu:/ noun 1 [count] : something that helps a person find something, understand something, or solve a mystery or puzzle
▪ The book gives the reader plenty of clues to solve the mystery. ▪ Science gives us clues about the origin of the universe. ▪ “Guess who I met today.” “Can you give me a clue?” ▪ It gives a clue as to how to proceed. ▪ a crossword puzzle clue 2 [singular] informal : an understanding of something : knowledge about something : idea
▪ Get a clue! [=don't be so stupid or clueless] — usually used in negative statements ▪ I had no clue what he meant. [=I didn't understand what he meant at all] ▪ He doesn't have a clue when it comes to fixing cars. [=he knows nothing about fixing cars] ▪ Do you have any clue about what's going on here? ▪ When it comes to computers, I don't have a clue. [=I'm clueless]
▪ The book gives the reader plenty of clues to solve the mystery. ▪ Science gives us clues about the origin of the universe. ▪ “Guess who I met today.” “Can you give me a clue?” ▪ It gives a clue as to how to proceed. ▪ a crossword puzzle clue
▪ Get a clue! [=don't be so stupid or clueless] — usually used in negative statements ▪ I had no clue what he meant. [=I didn't understand what he meant at all] ▪ He doesn't have a clue when it comes to fixing cars. [=he knows nothing about fixing cars] ▪ Do you have any clue about what's going on here? ▪ When it comes to computers, I don't have a clue. [=I'm clueless]
