Possible Clues:

• Long-eared hopper
• *Long-eared hare
• Long-eared North American hare
• Talk at length after knave produces hare
• It's a hare
• Fast American runner or weightlifter, poor sportsman
• American runner, one in a suit, poor performer
• Raise yak, a sprightly creature
• Fast runner in fur coat after synagogue leader replaces its back
• Fish with poor sportsman, making a fast buck?