/klu:; klu/
n
1 ~ (to sth) fact or piece of evidence that helps to solve a problem or reveal the truth in an investigation 线索; 端倪
*The only clue to the identity of the murderer was a half-smoked cigarette. 鉴定谋杀者的唯一线索是一枝吸了一半的香烟.
* We have no clue as to where she went after she left home. 我们对她离家後去往何处毫无线索.
2 word or words indicating the answer to be inserted in a crossword puzzle （纵横填字字谜中对应填词语的）提示词语.
3 (idm 习语) not have a `clue (infml 口)
(a) not know (anything about) sth; not know how to do sth 对某事物一无所知; 不知如何做某事物
*`When does the train leave?' `I haven't a clue.' ｀火车什么时候开?＇｀我完全不知道.＇
(b) (derog 贬) be stupid or incompetent 愚笨; 无能
*`Don't ask him to do it he hasn't a clue. ' ｀不要叫他做--他没本事.＇

v (phr v) clue sb up (about/on sth) (infml 口) (usu passive 通常用于被动语态) make sb well-informed (about sth) 使某人熟知（某事物）
*She's really clued up on politics. 她对政治非常博学多闻.

Clue
trademark
the US name for the game Cluedo