Related Clues:

• Reason to demonstrate
• The whales, say
• Save the Whales, for one
• Free Tibet, e.g.
• Thinking
• Activist's passion
• The logical basis of some thing or action
• It brings about an effect
• A movement or charity- usually good
• Give rise to
• Is that the reason behind having to restrict the beer allowance?
• The theory behind this is to allow only so much beer, it seems
• Allowed only so much beer, perhaps, and with reason
• The reasoning behind this is only to allow so much beer
• Limit the consumption of beer?