Answer: puffball

AnswerCrossword Clue
PUFFBALLSpherical mushroom
PUFFBALLEdible fungus.
PUFFBALLIt gets a big head
puffballAnything round and fluffy, such as a powder puff
puffballany of various globular fungi
puffballA fungus that produces a spherical or pear-shaped fruiting body that ruptures when ripe to release a cloud of spores