Related Clues:

• Spade, e.g., slangily
• Spade, e.g., briefly
• Sherlock
• V.I. Warshawski, e.g.
• Dick Tracy is one, briefly
• Detective, slangily
• Sleuth (Sl.)
• Gumshoe, slangily
• Pulp protagonist, perhaps
• Spade or Spenser
• Slangy sleuth
• Private dick
• Private eye, briefly
• Sam Spade type
• Pulp fiction gumshoe