Clairvoyance is the word we use when someone has the ability to speak to the spirit world.
Clairsensing is the correct term for communicating with those who have passed over. Clairvoyance and clairaudience both come under 'Clairsensing. The 'clair' means clear, 'voyance' is seeing, and 'audience' is hearing.
Through my sensing I can cross over between worlds and then converse with those who wish to come and speak with you. Usually the contacted spirit will be a relation or friend, but sometimes, a higher source of being will come through, offering advice for you and those around you. I can also communicate with the souls of the living. Out of respect I will not search for them but only communicate with those who come to me and are willing to share their knowledge for the highest good of all concerned.
The world of spirit is a complicated place! The longer someone has been passed over the easier it is for them to come through. It is not always possible for a spirit to come forward. Should this be the case, I can normally speak to their guides to find out how they are and what they are up to.