Answer:

ROLLSOVER

Answer	Crossword Clue
ROLLSOVER	Does a canine trick.
ROLLSOVER	Does a dog trick
ROLLSOVER	Goes back to zero, say

ROLLSOVER	Does a certain dog trick
ROLLSOVER	Reinvests, in a way

Crossword

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