Related Clues:

• Aid for a detective
• Barrier for Superman's X-ray vision
• Word in many a Nancy Drew title
• Detective's lead
• Whodunit game
• Assume command
• ''Get the ___ out!''
• What a salesperson may follow
• Crossword item
• Spearhead
• Role for a star
• This line or the next, e.g.
• Soft metal
• Game with Miss Scarlet and Professor Plum
• Bit of help