Related Clues:

• Porkers
• Nursery rhyme trio
• Kiddie-lit trio
• Really tough tasks
• Chicago squad
• Den denizens
• Fairy tale trio
• The Refrigerator's team
• Sty group
• Not the daintiest of eaters
• ODs, with "out"
• Muppet trio The Oinker Sisters, e.g.
• Animals on Dorothy's farm
• Gluttons
• Least frequent fliers?