Possible Clues:

• Part of church intersecting nave
• Part of church off aisle
• Priest finally managed awkward step crossing part of church
• Wing with unusual patterns
• It intersects the nave
• Part of church exhibiting a variety of patterns
• Cross-aisle in church
• Time went quickly with little pressure in established wing of church
• Eponymous Fay Weldon heroine hides identity in powerful Disraeli character
• Patterns in part of church at right angle to nave