"Clairalience" or 'clear smelling'  is, to put it simply, clairvoyance of the sense of 
smell. Clairvoyant talents of the mind come in a variety of facets, and Clairalience is one of them. 
 Clairalience is one of the harder clairvoyant
 talents to develop. If you are a beginner at developing psychic 
abilities, it might be best to work on other talents that are easier to 
work on and more useful. Scents can often be difficult to identify, and 
experiencing only scents might leave you confused.

