Possible Clues:

• Device for measuring speed
• Dash device
• Instrument measuring speed of rotation
• Cab's recording device disabled remote chat
• Puts a figure on the speed that's rubbish around college residence and part of the hospital
• Recorder of speed? Move me to the car!
• Teacher Tom (anag.)
• The car to me is mysterious — this is just one instrument
• Act drunk at address with half a bitter? It's some measure of what someone is driving at!
• It measures revolutions