Is Clitoris a neurological terminal point of “visible� extension only to feminine homosapian.? If it’s like, that what is evolutionary significance of this organ?

lmfao!!!!

It's not only a human feature; its found in nearly all mammals. Also, don't think that because a structure exists it must be the product of a selective pressure. Its homologous to the penis glans. It develops from the genital tubercle, which in the male becomes the penis. Think of it as what would have been a penis had it been given the correct hormones at the right time. The fact that it is present in females does not imply an evolutionary significance, but rather a conservation of energy. Basically males and females are the same during early embryogenesis. In the male this structure, particularly the erectile tissue goes into a state of enhanced development. In the female it does not, but retains all of the dense nerve tissue. It also has erectile tissues, but not as much.

The clitoris of women who use steroids get enlarged, google it.