Possible Clues:

• Exercise fan consuming a snack
• Gym fanatic consuming a source of protein
• Fish starters of escargots plated up - all with type of butter
• It ripens in a vine pod underground
• Petronas and Exxon initially put fish back to get source of oil
• Protein-rich food, case of prize fish turned up
• Edible seed, many of which would yield paltry sum
• Swimmer turned up after exercise for bit of food
• Seed Greek character planted in compost material
• Fitness fanatic consumes a little bit of a snack