Answer: upshift

AnswerCrossword Clue
UPSHIFTChange gears
UPSHIFTGo from 1st to 2nd
UPSHIFTAdvance to third, e.g.
UPSHIFTGo into a higher gear
upshiftIncrease
upshiftto shift an automotive vehicle into a higher gear
upshiftChange to a higher gear in a motor vehicle