Answer: sparkplug

AnswerCrossword Clue
SPARKPLUG

Tune-up supply

SPARKPLUG

Auto tune-up item

SPARKPLUG

Tune-up item

SPARKPLUG
Ignition system device
SPARKPLUG
Barney Google's nag
SPARKPLUGEngine part.
SPARKPLUGBarney Google's horse
SPARKPLUGInitiator of action
SPARKPLUGComic-strip horse
SPARKPLUGBarney Google's mount
SPARKPLUGMotivator
SPARKPLUGBarney Google's hoss