Possible Clues:

• One begat with her so as to understand what it's all about
• Assemble - conclude - contract
• Is one to understand that the label is the wrong way round with her?
• Collect that comes at the start of 19 down
• The bit of stuff turns up around the get-together
• Gate-crasher misses races and rally
• Races away from gatecrasher to Gareth Cook?
• Be led to believe pistol on way to her
• A Mass for Gareth Cook
• Learn of