Related Clues:

• It may be immune or conditioned
• Debate feature
• "You're welcome," for one
• Answer or reaction
• A contradiction of evidence
• Answer, reply
• Answer, reaction
• A disproving or rejection of evidence
• Reaction, reply
• Rejoinder, retort
• Preens so by way of answer
• Press one for a reply
• Refuting argument
• 'Answer, reply (8)'
• This could press one to make some answer