Crossword puzzle clue "unlike chestnuts"

of recent origin

BROMIDE, a bromine compound, also BROMID

CHINKAPIN, (Native American) the dwarf chestnut of the US, also CHINCAPIN, CHINQUAPIN

CONKER, a horse-chestnut used in a British game

to project by discharging from a gun

white with age

to provide with a large hoofed mammal