Possible Clues:

• Reckless driver
• Bully driving animal under carriageway
• He's no pig, but he won't let others pass
• Boorishly reckless driver
• That swine sounds as if he might be a crashing bore
• That swine is likely to have a smashing time (4, 3)
• Tough-to-pass one
• Reckless driver travelled noisily on motorbike
• Selfish driver (2 words)
• Travelled on unlikely flier, we hear -- one making the journey difficult