Answer: openingday

AnswerCrossword Clue
OPENINGDAYSeason beginner
OPENINGDAYAnnual rite of spring
OPENINGDAYSeason starter
OPENINGDAYBaseball season beginner
OPENINGDAYBaseball milestone
OPENINGDAYDecember 25?
OPENINGDAYGood time to use your ace
OPENINGDAYDecember 25, in a way?
OPENINGDAYWhen lots of popcorn and peanuts are sold
OPENINGDAYStart of the baseball season ... or what the start of each starred clue is?