Related Clues:

• Detective's need
• Print, maybe
• It may be found with a magnifying glass
• Guiding light?
• Inkling
• Fingerprint, perhaps
• Sleuth's find
• Airhead's lack?
• Footprint, maybe
• This is one
• You're looking at one
• Popular board game
• Pointer
• Crossword hint
• Bit of evidence