hiddenclue
nounUK /ˈhɪd.ən kluː/
US /ˈhɪd.ən kluː/
A hidden clue is a hint that is hard to see or find.
The detective found a hidden clue under the old rug.
OTHER MEANINGS
2. A small mark in a picture that helps solve a puzzle.
Look closely at the tree for a hidden clue.
3. A quiet signal in a story that hints at what happens next.
The author left a hidden clue about the ending in chapter two.
4. A fact kept out of sight that helps answer a question.
The scientist discovered a hidden clue in the old notes.