Answer:

sand

Answer	Crossword Clue
SAND	Beach composition
SAND	Beach bucketful
SAND	Makeup of a beach

SAND	Smooth
SAND	Hourglass contents
SAND	Makings of a castle at the beach
SAND	Beach makeup
SAND	What some castles are made of
SAND	Composition of dunes
SAND	Bunker fill
SAND	Beach formation

SAND	Contents of some banks
SAND	Cement mixer input
SAND	Beach blanket?
SAND	Hourglass filler
SAND	Beach castle material
SAND	Make smooth
SAND	Hourglass fill
SAND	Take the edge off?

SAND	Levee material
SAND	Gear impediment
SAND	Ocean liner?
SAND	Innards of some clocks
SAND	Soft rock?
SAND	Dune material
SAND	Trap filler
SAND	Bank deposit

SAND	Grit
SAND	Work across the board?
SAND	It may be driven during a storm
SAND	Take the edge off
SAND	It may cover a lot
SAND	Kind of flea or dollar
SAND	Contents of a playground box
SAND	Kind of trap

SAND	Castle material
SAND	Dudevant's pseudonym
SAND	Dudevant's pen name
SAND	Novelist George
SAND	Amandine Dupin's pen name