Answer:

EXTRAINNINGS

Answer	Crossword Clue
EXTRAINNINGS	The tenth and beyond
EXTRAINNINGS	Tiebreaking periods on the diamond
EXTRAINNINGS	Ballgame extenders

EXTRAINNINGS	Baseball tiebreakers
EXTRAINNINGS	Baseball overtime.
EXTRAINNINGS	Tie breakers.
EXTRAINNINGS	Overtime at Shea
EXTRAINNINGS	Ballgame extenders ... and what can literally be found in the answers to the asterisked clues