Possible Clues:

• It may be fired up to get as good as gold
• Enthusiast contains rising urge for valuable bit of information
• Golden goodie
• Raw lump (of gold)
• Lump of, eg, gold
• A lump of metal, say gold
• Turn up with a weapon and get as good as gold
• Reverse the weapon and get it as good as gold
• Rev about to appreciate something valuable
• The hard bit for teachers? Eating scrambled egg!