“__ Effect” Is Something That Gathers Pace
Puzzle 13 of Famous Streets Easy Pack
Question is: “__ Effect” Is Something That Gathers Pace
and the answer is: SNOWBALL
Word Meaning:
SNOWBALL — A ball of snow, usually one made in the hand and thrown for amusement in a snowball fight; also a larger ball of snow made by rolling a snowball around in snow that sticks to it and increases its diameter.
Definitions from Wiktionary.