Related Clues:

• Not even a semi-pro?
• Prefix similar to 'contra-'
• Wanting to give opponent a hiding
• Challenger in sportswoman, tiring
• Against, informally
• Prefix for repellents
• Lead-in to government or body
• Opposed to some revolutionary illicit narcotics
• Opposed to books being dumped in main road
• Prefix for "body" or "biotic"
• Prefix with "trust" or "rust"
• Prefix for "venom"
• Voting no on, or not pro
• Prefix for 'matter'
• Against, initially