Possible Clues:

• Taxi driver
• Hack
• ''Where to?'' asker
• Taxi driver (colloq.)
• One hailed in the streets
• One whose business is picking up
• To whom the Fresh Prince yelled 'Smell ya later'
• Ernie, in ''It's a Wonderful Life''
• Driver: person who'd carry one's books for pennies once
• Hack driver