Answer:

maggot

Answer	Crossword Clue
MAGGOT	Housefly larva
MAGGOT	Insect larva
MAGGOT	Obsessive idea

MAGGOT	Fantastic notion
MAGGOT	Larva, whim or obsession
MAGGOT	Whim
MAGGOT	Parasitic grub
MAGGOT	Rotten insect
MAGGOT	Fly larva
MAGGOT	Fly-to-be

Crossword

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