Possible Clues:

• Fortress (in or near city)
• After a century it might deal with the strength of it
• Keep using unusual dialect
• Strong point of (roughly) detail (roughly)
• One bit smuggled into prisoner's room - not totally secure building!
• See, it gets a deal of a mixture to make it strong
• Keep it laced, stupid!
• The Acropolis, once
• Charleston college (with "The")
• Keep short quote by fabulous singer