Answer:

GEL

Answer	Crossword Clue
GEL	Hair stuff
GEL	Set
GEL	Some toothpaste

GEL	Stylist's supply
GEL	Toothpaste, perhaps
GEL	Hair stiffener
GEL	Mousse for the hair
GEL	Take shape
GEL	Hair mousse
GEL	Hair-care goo
GEL	Help for a bad hair day

GEL	Hair-raiser
GEL	React to pectin
GEL	Toothpaste type
GEL	Do stuff?
GEL	Rockabilly musician's styling product
GEL	Stuff used for styling
GEL	Product that makes hair crunchy
GEL	Toothpaste, maybe

GEL	Axe offering
GEL	Post-shower application
GEL	Hair goo
GEL	Salon stuff
GEL	Stylist's stuff
GEL	Solidify
GEL	Come together
GEL	Agar, for one

GEL	Hairstyling product
GEL	Silica ... (drying agent)
GEL	Hair-care product
GEL	Hair-salon application
GEL	Newfangled candle material
GEL	Salon substance
GEL	Hair-raising stuff?
GEL	Petri dish filler

GEL	Shaving-cream alternative
GEL	Coalesce
GEL	Crystallize
GEL	Materialize
GEL	Salon application