Answer:

horselaugh

Answer	Crossword Clue
HORSELAUGH	Guffaw
HORSELAUGH	Guffaw.
HORSELAUGH	Mr. Ed's reaction to a good joke?

HORSELAUGH	It may be heard on a funny farm?
HORSELAUGH	Heard on a funny farm?
HORSELAUGH	Loud hee-haw
HORSELAUGH	Whinneying yuk

Crossword

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