Answer: overdrives

AnswerCrossword Clue
OVERDRIVESCertain car gears
OVERDRIVESFifth gears, often
overdrivesA mechanism that permits a higher than normal operating level in a piece of equipment, such as the amplifier of an electric guitar
overdrivesA gear in a motor vehicle providing a gear ratio higher than that of the drive gear or top gear, so that engine speed and fuel consumption are reduced in highway travel
overdrivesA state of high or excessive activity
overdrivesOVERDRIVE, to drive to excess