Possible Clues:

• Star name, one not using animals
• One not using animal products
• A particular diet for one in front
• Tofurky eater at Thanksgiving, perhaps
• One who will not have animals, say, in a vehicle
• Many an animal rights activist
• Conscientious consumer for example in goods vehicle
• One who eschews meat
• One avoiding all animal-based food
• Herbivore