Related Clues:

• Prefix with lock
• A demonstrated position?
• Body opening?
• Opposer
• Not even a semipro?
• In opposition to
• 'Nay!' sayer
• With the enemy, perhaps
• ''Social'' leader
• Not in favor
• Proposal opposer
• One not pure of heart
• Opposing voice
• Prefix with freeze
• One full of odium