Possible Clues:

• Fire-starting matter
• Perhaps the sort of fish that's light
• Fire wood of the sort Erica gets
• Setting fire to brushwood
• The sort of fish one might make light of
• The sort of fish you'd find in a burn?
• Perhaps the sort of fish that might get one fired
• The sort of fish that may start firing
• Lighting fire, family doctor starts with fish
• It promotes fires in the home