Related Clues:

• Lead to
• Charitable undertaking
• Induce
• Make happen
• Something worth fighting for
• Revolution, for one
• Underlying reason
• Effect's partner
• Reason to demonstrate
• The whales, say
• Save the Whales, for one
• Free Tibet, e.g.
• Activist's passion
• It brings about an effect
• A movement or charity- usually good