An object or a kind of indication which may be used as evidence.
Information which may lead one to a certain point or conclusion.
Insight or understanding ("to have a clue [about]" or "to have clue". See have a clue, clue stick)
To provide with a clue.
To provide someone with information which he or she lacks (often used with "in" or "up").
Something spoken or written that is intended to warn.
The action of the verb warn; an instance of warning someone.
Used to warn of danger in signs and notices.