Answer:

FOUR

Answer	Crossword Clue
FOUR	... striper: naval captain
FOUR	Start of an 1863 address
FOUR	Wallace novel, "The ... Just Men"

FOUR	Tea time
FOUR	Bobby Orr's number
FOUR	Polo team
FOUR	Deck suit complement
FOUR	Figure on Orr's back
FOUR	Nearly quitting time?
FOUR	Teatime
FOUR	Typical par

FOUR	Grand slam run count
FOUR	Small square
FOUR	Horsemen count
FOUR	Bridge quorum
FOUR	IV, sometimes
FOUR	.. Corners
FOUR	Brett Favre's number
FOUR	Final complement, perhaps

FOUR	Typical barbershop complement
FOUR	Lou Gehrig's number
FOUR	Quotation, Part 2
FOUR	Ultimate ball
FOUR	...-star review (rave)
FOUR	Barbershop group
FOUR	Tetrad
FOUR	Fab number, in rock-'n'-roll

FOUR	Number of apocalyptic horsemen
FOUR	... Corners (Western intersection of note)
FOUR	The Fantastic ... (superhero group)
FOUR	Halfway between ten and ten, if you only count to twelve
FOUR	Square of the only even prime
FOUR	Number of Roosevelt's freedoms
FOUR	Elevator stop
FOUR	Number for golf

FOUR	... letter word
FOUR	Calling birds count, in song
FOUR	Tea time, perhaps
FOUR	F or H preceder
FOUR	Trey topper