1) Buckeye 2) Horse chestnut 3) Microsoft franchise 4) Reportedly win horse chestnut 5) Seed 6) Seed of the horse chestnut Found on https://www.crosswordclues.com/clue/conker
a horse chestnut. · the hollowed-out shell of a horse chestnut. · a game in which a child swings a horse chestnut on a string in an attempt to break that of another player. Found on https://www.infoplease.com/dictionary/conker