Possible Clues:

• Trust a motor to get let go into reverse
• Allow motoring organisation to set up political alliance
• Protective trade group for claret
• Ring telephone on vehicle
• The sort of vehicle that won't let down in business
• Ring from telephone on vehicle
• Trust this is a let-up for your vehicle
• Trust the bus to get let up
• Trust
• The motor will let up, even with trust to make it 6 down