Answer:

hair

Answer	Crossword Clue
HAIR	"Aquarius" musical
HAIR	Barber's concern
HAIR	Head topper

HAIR	Slightest of margins
HAIR	Stuffing for a mattress
HAIR	1967 rock musical
HAIR	Source of Samson's strength
HAIR	1968 rock musical
HAIR	It grows on you
HAIR	Rock musical
HAIR	"Frank Mills" musical

HAIR	Rapunzel's claim to fame
HAIR	Narrow margin
HAIR	Long-running musical
HAIR	1960s musical
HAIR	Access to Rapunzel
HAIR	Rapunzel's ladder
HAIR	"Abie Baby" musical
HAIR	Salon sweepings

HAIR	Filament
HAIR	Head locks
HAIR	It may be worn down
HAIR	It's over one's head
HAIR	Mammoth DNA source
HAIR	Beehive material?
HAIR	Beehive's makeup
HAIR	Object of lots of teasing?

HAIR	1960's "love-rock" musical
HAIR	Beautician's concern
HAIR	"Easy to Be Hard" musical
HAIR	Minuscule margin
HAIR	Mop, perhaps
HAIR	Musical with the song "Hare Krishna"
HAIR	"Good Morning Starshine" musical
HAIR	"I Got Life" musical

HAIR	Head covering
HAIR	Narrowest of margins
HAIR	Rapunzel's pride
HAIR	Tonsorial target
HAIR	Locks