Answer: thirty

AnswerCrossword Clue
THIRTYPart of a tennis score.
thirtyten times three
thirtya number
THIRTYSecond point at Wimbledon
THIRTYNumber signifying "the end" on a wire story
THIRTYIndicator of a news story's end
THIRTYScore for a small straight in Yahtzee
THIRTYA tennis point
THIRTYSecond point in tennis
THIRTYOld, to some teens?
THIRTYSix, for the big hand
THIRTYJune number
THIRTY... Tyrants of ancient Athens
THIRTY"... Seconds Over Tokyo"
THIRTYMarket-crash year
THIRTYNumbers in some months
THIRTYSign marking end of journalistic copy.
THIRTYNewspaper term meaning the end.
THIRTYThe End: Printer's slang.
THIRTYXXX
THIRTYDays in April
THIRTYMinimum age for a Senator
THIRTY"End of story," to a journalist
THIRTYTwo after love?
THIRTYMinimum age for a U.S. senator
THIRTY"... days hath..."
THIRTYXXX rating?
THIRTYPartial tennis score
THIRTYXXX, to Xenocrates