Possible Clues:

• Funeral director
• Does he give a guarantee when dressed in black?
• Entrepreneur, one involved with boxing people?
• The type of person with grave responsibilities you'll probably have to meet in passing?
• Grave fellow and dangerous driver?
• You'd be done for, being laid out by such a professional
• Person setting out on a task as mortician
• He'll let you down when you¿re done for
• One managing stiff ceremonies?
• One doing for the done for?