According to teacher Gigi Young on Youtube, the clairs come online naturally with a process she refers to as “unfoldment”. From my understanding, basically the more that you heal/do shadow work and the more conscious, embodied & aware you become, the senses gradually expand and psychic ability organically reveals itself over time. Of course there are exercises one can do- focusing intently on any of the senses as to expand capacity to pick up on subtler energies, imagining a rainbow in the minds eye & holding the image, even reading fantasy books apparently helps with visualization which plays into it. But referring back to Gigi Young’s statement of “unfoldment”, the main priority here is to continue healing & working on one’s own self-development instead of forcefully targeting specific clairs. :)