Answer:

ten

Answer	Crossword Clue
TEN	A real knockout, perhaps
TEN	Decade
TEN	Gymnast's goal

TEN	Letterman list count
TEN	Number of toes on a chimpanzee
TEN	Perfect score
TEN	Sawbuck
TEN	Where Hamilton is
TEN	Famous Downing Street address
TEN	Five's partner
TEN	Half a Score

TEN	Half a score
TEN	Perfect score?
TEN	Top score, sometimes
TEN	..-four (bit of CB slang)
TEN	Decimal base
TEN	Half a double sawbuck
TEN	It's an honor
TEN	On a scale score

TEN	Royal flush necessity
TEN	The cardinal number equal to 9 + 1
TEN	X, to Cato
TEN	"... a ... O'clock..."
TEN	Bodacious rating
TEN	Neymar's number
TEN	Top of some scales
TEN	Perfect rating

TEN	Pin number?
TEN	X rating?
TEN	Lobster's leg count
TEN	Derek film
TEN	Bo Derek film
TEN	Hamilton's note
TEN	Letterman list, e.g.
TEN	Top of some ratings

TEN	Softball complement
TEN	Countdown starter
TEN	Mid-morning
TEN	What X can mean
TEN	Finger allotment