Answer:

nine

Answer	Crossword Clue
NINE	Cloud .... (elated state)
NINE	Not exactly a ten
NINE	Number of Muses

NINE	Number on a diamond
NINE	Sayers' "The .. Tailors"
NINE	Sayers' "The .... Tailors"
NINE	Three square
NINE	1-2 a round
NINE	Baseball number
NINE	Baseball team
NINE	Start of the day, to many

NINE	Workday start, for many
NINE	1982 musical based on Fellini's life
NINE	2100 hours
NINE	Common starting time
NINE	Three square (4)
NINE	Band of Pirates?
NINE	Cloud .. (elated state)
NINE	Square root of 81

NINE	Three three times
NINE	Late rush hour hour
NINE	Muse count
NINE	Half a course
NINE	Workday debut
NINE	Ball team quorum
NINE	Diamond number
NINE	Inning allotment

NINE	Supreme Court, e.g.
NINE	Prime-time hour
NINE	Ted Williams's number
NINE	Roger Maris's jersey number
NINE	2007 Jeffrey Toobin book, with "The"
NINE	Musical based on a Fellini film
NINE	A perfect square
NINE	West Coast ZIP-code starter

NINE	... Elms (London district where Vauxhall Motors was founded)
NINE	Muse group
NINE	Opening time
NINE	Prime time hour Thomas
NINE	1982 and 2003 Tony winner