Hint (noun)

1. A slight suggestion or vague suggestion.
2. A small piece of information that helps solve a problem or discover something.

Origin:

Late 16th century: of unknown origin.

Examples:

1. She gave me a hint about the surprise party.
2. The teacher gave a few hints about the test to the students.
3. The detective was looking for a hint to solve the mystery.
4. The author dropped a hint about the plot twist in the book.
5. The crossword puzzle had a few hints to help the solver.