Answer:

ebonies

Answer	Crossword Clue
EBONIES	Some piano keys
EBONIES	Black keys
EBONIES	Trees that yield heavy wood

EBONIES	Trees for keys
EBONIES	Sharp and flat keys, on a piano
EBONIES	Black piano keys, familiarly
EBONIES	Black woods
EBONIES	Durable woods
EBONIES	Trees whose wood doesn't float
EBONIES	Black woods.
EBONIES	Trees yielding valuable wood.

EBONIES	Dark woods.
EBONIES	Decorative woods.
EBONIES	Tropical hardwood trees.
EBONIES	Black keys.
EBONIES	Hardwoods
EBONIES	Valuable tropical trees
EBONIES	Sources of wood for cabinetwork
EBONIES	Some keys

EBONIES	Piano's 36, familiarly
EBONIES	A piano has 36 of them
EBONIES	Trees yielding black wood
EBONIES	Black piano keys, informally
EBONIES	Trees used for making piano keys
EBONIES	Part of a keyboard
EBONIES	Keys of music