Possible Clues:

• Vehicle's taking heavyweight container
• Crafty type involved in racket is a product of the boxing industry perhaps
• Keep transporting box?
• Parliament group?
• Box needed by vicar tonight
• Box of revolutionary Fats Domino tracks
• Egg box
• Packing case
• He dies in Darnay's place in "A Tale of Two Cities"
• Box only initially missing from humorous drawing