Possible Clues:

• Burden I had laid down by Thames maybe -- as one helping passenger?
• Shout for a lift to drive Romeo with chauffeur
• Hack
• Charge I had on running water meter reader found?
• Road user arrived roughly around eleven, on time
• One whose business originates from rank?
• De Niro movie with the line "You talkin' to me?"
• 64-/65-Across work of 1976
• Worker in a metered vehicle
• Test papers? Test for one cabbie