Possible Clues:

• Various patterns appear in part of church
• Arm of church body organised harvest festival time after time
• Strange patterns in wing
• Area that separates the nave from the sanctuary
• Patterns (anag.); part of church
• Part of church school putting one off at start of academic year?
• A month after one's torn from vehicle, wing found
• Part of church making intricate patterns
• It's at right angles to the nave in church
• Church part at right angle to nave