The term 'smell out' can be summarized as the act of detecting something. The crossword solutions for this term are DETECT, which is a 6-letter word. To smell out something is to use one's sense of smell to DETECT or discover something, such as a scent or an odor. It can also refer to the act of uncovering something hidden or suspicious. Smelling out is often used in reference to animals, such as dogs, who have a heightened sense of smell and can be trained to DETECT certain scents.