Possible Clues:

• Like Napoleon, before Elba?
• Sound enough for the first murder victim
• Learner in Lincoln practised
• Word that keeps the same meaning if 'cap-' is added at the front
• Talented bachelor getting in some drink
• Competent, like a seaman
• Bright
• Adjective for a seaman
• They say he was murdered, though fit
• Of high proficiency