The term CLUE BLOODHOUND refers to a breed of dog known for its keen sense of SMELL. This breed is often used by law enforcement to track down criminals or missing persons. The crossword solutions for this term include ODOR (4 letters), SCENT (5 letters), SMELL (5 letters), SPOOR (5 letters), NOSE (4 letters), and JOWLS (5 letters). All of these words refer to the Bloodhound's ability to detect scents, which is why it is so useful in tracking down clues. The jowls of the Bloodhound are also distinctive, and help to identify the breed.