Possible Clues:

• Thieves' outwitter
• Pass master is the greatest baby
• With 40 thieves, he's a fictional woodcutter
• E-commerce giant
• '... ... and the Forty Thieves' (Arabian Nights)
• Woodcutter who stole from thieves
• Gilbert, inter alia, was associated with 40 1 down
• He may get bail to a degree, even in thievish company
• "Open sesame" speaker
• Richard Burton subject