Possible Clues:

• Brass instrument's valve
• Motor City hoopster
• Don't drink up a little - drive up and down
• Detroit pro
• Do not drink up if one is driving
• Don't drink up or go up and down
• Valve that's instrumental part of engine
• NBAer
• There's not a little drink in the engine back there
• It's going up and down, but not to drink up