Related Clues:

• Not on the pro side?
• War front?
• Rihanna's smash album of 2016
• Viral opening?
• Prefix with "biotic"
• U-turn from supporter
• "Thesis" start
• Opponent in giant, indomitable
• One with a '-phobe' suffix, perhaps
• Bigoted sort
• Foe of a pro
• Start to lock
• It means ''adverse to''
• Oppositional one
• Like the cons