Answer: sparkplug

AnswerCrossword Clue
SPARKPLUGTune-up supply
SPARKPLUGAuto tune-up item
SPARKPLUGTune-up item
SPARKPLUGIgnition system device
SPARKPLUGBarney Google's nag
SPARKPLUGEngine part.
SPARKPLUGBarney Google's horse
SPARKPLUGInitiator of action
SPARKPLUGComic-strip horse
SPARKPLUGBarney Google's mount
SPARKPLUGMotivator
SPARKPLUGBarney Google's hoss
sparkplugto spark something off, in the manner of a sparkplug in a car carrying wires between which an electric spark passes to fire the explosive mixture of gases