chestnut

An edible, starchy nut from a tree, often roasted and eaten.

"We gathered chestnuts to roast for Christmas."

A rich reddish-brown colour, resembling the ripe nut's hue.

"She admired the horse's glossy chestnut coat."

An old, hackneyed story, joke, or remark that is frequently repeated.

"Oh, not that old chestnut again!"