Possible Clues:

• Temper when old car not starting
• 30-Across' emotion
• Provoke annoyance
• Hostility's risk initially cut short
• Kenneth --, US film-maker, author of 'Hollywood Babylon'
• Theme of many heavy metal songs
• Strong feeling of annoyance
• Strong resentment, as peril is headed off
• Old car not starting creates fury
• Head off old car, producing road rage, for example