Answer: truing

AnswerCrossword Clue
TRUINGMaking aligned
TRUINGMaking exact.
TRUINGSetting straight or righting
TRUINGMaking even
truingto make level, square, balanced, or concentric bring or restore to a desired mechanical accuracy or form true up a board true up an engine cylinder
truingTRUE, to conform to a standard or requirement