An synechdochic designation, which uses the clacking of high heels to refer to the women who wear them. Notable primarily because there does seem to be a certain kind of woman who 'clacks.' The clacking lifestyle does not consist solely of wearing high heels and appropriately coordinated outfits. It is a culturally-mediated act of self-abnegation and penance for unspecified sins against society.
From the otherwise unremarkable book The Devil Wears Prada.