Possible Clues:

• In a car, would drink ever bring an end to his caree?
• Cleverly bring about
• In green, 'e will keep things running
• Making progress on a road, one may be civil
• US or Canadian train driver
• In Bow he never takes alcohol, being a mechanic
• Effect this professional man produced
• Deviser
• One can be chemical, civil or mechanical
• American whose job is on the line