Answer:

molehill

Answer	Crossword Clue
MOLEHILL	Sign of a lawn infestation
MOLEHILL	Potential mountain, for some
MOLEHILL	Mountain, to some

MOLEHILL	Lawn-pest evidence
MOLEHILL	Proverbial trifle
MOLEHILL	Certain mound of earth

Crossword

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