Possible Clues:

• Petty thief
• Stealthy thief
• Crook is for the third time to switch second home designation over?
• One stealing small items
• A petty thief
• Thief who steals in small quantities
• Thief
• A thief of small items as from shops
• It's time to give a firm turn to where the key goes in
• If she's a thief, this sounds like the right medicine for her