Possible Clues:

• The Great Escape perhaps is outstanding
• Stairs to the attic, which is first class
• Really excellent work flourished in difficult situation
• Excellent final steps for upwardly mobile type
• Summit on fluorine provides illumination at the highest level
• Private firm initially brought in to illuminate A1
• Excellent spinner having fine match
• Champion in great escape
• Leading thinker's work on female brilliance is outstanding
• First-class spinner having fine match