Possible Clues:

• Spend extravagantly
• Give generously when there's a whip-round?
• Attack yobbo hugging tree
• Make a harsh attack
• The French cry 'Attack!'
• Verbally attack, with 'at'
• Attack oafish tree-hugger?
• React violently
• Spend loads getting Al back with a round of drinks
• Erupt in anger