Possible Clues:

• Antidote is perhaps a foot behind the bar
• Bar tape perhaps provides antidote
• Retaliation rule in haberdashery?
• Reckon mere rearranging's a positive preventive step
• Noble monarch supported by me over a certain retaliatory action
• Totter when united in simple act of defence?
• One's ration by the bar is taken to avoid a threat
• Action taken to offset another
• Board members initially certain about each action to avert danger
• Retaliatory move