Clairalience
From Kook Science
Clairalience (from French: clair ["clear"] + alience ["smelling"]; literally "clear smelling") is a term for the ability to acquire information in the form of olfactory sensation, particularly by utilising scent as an extra-sensory perceptive mode, as in the detection of odours that have no physical origin in the environment of the detector (and may not detected by others in the same space).
Similar abilities include clairvoyance (visual), clairaudience (audio), clairgustance (taste), clairsentience (feeling), and claircognizance (knowing).