Possible Clues:

• Lose ambition and yet score thus
• Let go of ambition to deliver score
• One's kicked lapdog for barking, but not loudly
• One way of scoring at rugby
• 22 down 26's trademark wild dog and polar bears
• Score — kick ball endlessly after game
• Sweet, empty lass one scores with over the bar
• Become less ambitious in exploit to score points?