Answer:

fungus

Answer	Crossword Clue
FUNGUS	Yeast, for one
FUNGUS	Lichen co-creator
FUNGUS	Mushroom, e.g.

FUNGUS	Toadstool.
FUNGUS	Puffball, for one
FUNGUS	A growing concern?
FUNGUS	Dry rot, e.g.
FUNGUS	Tinactin target
FUNGUS	Mushroom or mildew

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.