Related Clues:

• Pulp fiction gumshoe
• Spade, e.g., for short
• Common ratio
• 3.1416
• Clue analyzer, in slang
• Gumshoe, briefly
• Dick Tracy, e.g.
• Hammett's Spade, e.g.
• 3.14
• Short investigator?
• Sleuth, briefly
• Sue Grafton's Kinsey Millhone, e.g.
• Common pulp protagonist
• Hole or shaft in the ground.
• He works on a case-by-case basis