Related Clues:

• Sleuth (Sl.)
• Gumshoe, slangily
• Pulp protagonist, perhaps
• Slangy sleuth
• Private dick
• Private eye, briefly
• Sam Spade type
• Pulp fiction gumshoe
• Spade, e.g., for short
• Case worker
• Holmes or Poirot
• Clue analyzer, in slang
• Whodunit hero
• Gumshoe, briefly
• Dick Tracy, e.g.