Related Clues:

• Diamond datum
• Take a five-finger discount
• Inappropriately appropriate
• Great buy, slangily
• Take stock?
• Palm, say
• Real bargain
• Shoplift
• Tiptoe
• Reach second base, perhaps
• Lou Brock specialty
• 17-, 22-, 47- and 56-Across contain a form of it
• Be a burglar
• Take unlawfully
• Take second, e.g.