The difference between Clue and Signature

Clue as a noun (now, _, rare):

A strand of yarn etc. as used to guide one through a labyrinth; something which points the way, a guide.

Clue as a noun:

Information which may lead one to a certain point or conclusion.

Clue as a noun:

An object or a kind of indication which may be used as evidence.

Clue as a noun (slang):

Insight or understanding ("to have a clue [about]" or "to have clue". See have a clue, clue stick)

Clue as a verb:

To provide with a clue.

Clue as a verb:

To provide someone with information which he or she lacks (often used with "in" or "up").

Signature as a noun:

A person's name, written by that person.

Signature as a noun:

An act of signing one's name; an act of producing a signature.

Signature as a noun (medicine):

The part of a doctor's prescription containing directions for the patient.

Signature as a noun (music):

Signs on the stave indicating key and tempo, composed of the key signature and the time signature.

Signature as a noun (printing):

A group of four (or a multiple of four) pages printed such that, when folded, they become a section of a book.

Signature as a noun (computing):

A pattern used for matching the identity of a virus, the parameter types of a method, etc.

Signature as a noun (cryptography):

Data attached to a message that guarantees that the message originated from its claimed source.

Signature as a noun (figurative):

A mark or sign of implication.

Signature as a noun (mathematics):

A specifying the sign of coefficients in any of a .

Signature as a noun (medicine, obsolete):

A resemblance between the external character of a disease and those of some physical agent, for instance, that existing between the red skin of scarlet fever and a red cloth; supposed to indicate this agent in the treatment of the disease.

Signature as an adjective:

Distinctive, characteristic, indicative of identity.