Possible Clues:

• Not qualified to invest a billion in town, perhaps
• *Walking downtown, say
• Convalescent being thorough, taking in a book
• On the town
• Unqualified to nurse sailor in circulation again
• Sailor thoroughly protected and actively recovering?
• Active, at large
• Unqualified, degree held back is seemingly recovered
• Active away from home
• Complete coverage for sailor abroad after illness