clue to

例句：

1. Give a clue to sth.
   提供關於某事的線索
2. The only clue to the identity of the murderer was a half-smoked cigarette.
   鑑定謀殺者的唯一線索是一枝吸了一半的香菸。
3. I am totally bewildered by the clues to this crossword puzzle.
   這個縱橫字謎的提示完全把我弄糊塗了。
4. There is no clue to the identity of the thief.
   沒有確定竊賊身分的線索。