Answer: christening

AnswerCrossword Clue
CHRISTENINGUsing for the first time
christeningDedicate (a vessel, building, etc.) ceremonially
christeningCHRISTEN, to baptise (to administer baptism, also BAPTIZE)
christeningGive (a baby) a Christian name at baptism as a sign of admission to a Christian Church
christeningGive to (someone or something) a name that reflects a notable quality or characteristic
christeningUse for the first time