Possible Clues:

• Informally, an early bicycle without tyres or springs
• Bicycle with screw loose nearly going around as he collapsed
• Form of transport of patissier, accepting he's no different
• Doctor goes to fish on river, using two-wheeler
• What would have two wheels with two radiuses wobbling?
• Unreliable vehicle with inadequate suspension
• Old car somebody has crashed into kerb, unfortunately
• Old bicycle trader keeping one quiet
• Rickety vehicle (colloq.)
• It's a mistake to bury second fish in a heap