Related Clues:

• Sleuth, in potboilers
• Columbo, for one
• M.Hammer or S.Holmes
• Sam Spade, e.g
• D.Tracy, for one
• P.I., in old slang
• Investigator's hours out of college
• Noir sleuth
• Frequent film noir protagonist
• Adulterer follower, in slang
• Sleuth's cohort
• Snooping pro
• Private eye, in old slang
• P.I., slangily
• PI kin