Possible Clues:

• Ones in need of a metamorphosis
• Insects in the first stage of life
• They're just a little grubby
• Immature forms of invertebrates
• Might the R.A. make a veal grubby?
• That's enough to make a real V real grubby
• Insects in immature state
• Young eels
• Grubs and maggots
• Among the ancient Romans, a name for malignant spirits and ghosts