Related Clues:

• A ballet held very difficult at first — not for a beginner
• A Paul Jones, say, keeping very organised to the end, was progressive
• Far on; complex
• Sophisticated vehicle by church clamped by a theologian
• Lent was approaching
• Made progress during Lent!
• Made progress
• Highly developed plug for vehicle priced at 50%
• Got ahead, which is not easy for students
• Progressed air defence vehicle with chief engineer's department
• Promoted to a high level
• Far on
• Pass Land's End at a late stage
• Highly-developed sub used without purpose
• Far ahead in development