Possible Clues:

• Resistance in pop art destroyed sympathetic relationship
• Knock on left side evokes sympathy
• Bond has carpet left on board (7) {1,3}
• An understanding relationship between people
• Mutual sympathy
• Understanding that one may give the wine a knock (7)
• Empathy with the left going on strike
• Mutual sensitivity and understanding
• Feeling of mutual understanding
• A harmonious and understanding relationship between people