Answer: xxxxxxxxxxxx

AnswerCrossword Clue
xxxxxxxxxxxxA filing cabinet for the champion (6,6)
xxxxxxxxxxxxHe might make changes in the classroom (12)
xxxxxxxxxxxxHero, given car, had accident; he was biting off more than he could chew (12)
xxxxxxxxxxxxSpot star explosion at this place; it's very high up (12)
XXXXXXXXXXXXHow the perfect game is shown on the scoresheet