Possible Clues:

• Went to see a fellow motoring enthusiast to give a bit of a hand
• Bone a fish discovered in tin?
• Dealt with chum needing to collect a vehicle — something in hand
• Encountered a reproach almost entirely relating to bones
• Bone from a fish found in tin?
• Bone a fish contained in tin?
• Bone in hand
• Bone came apart, fragments left
• Came across a mechanical friend by way of a bone
• Contacted a motoring friend concerned with part of body