Answer:

hitbelowthebelt

Answer	Crossword Clue
HITBELOWTHEBELT	Be a bad sport, in a way
HITBELOWTHEBELT	Attacked unfairly
HITBELOWTHEBELT	Fight unfairly

HITBELOWTHEBELT	Play unfairly
HITBELOWTHEBELT	Play dirty
HITBELOWTHEBELT	Treat unfairly
HITBELOWTHEBELT	Use foul play
HITBELOWTHEBELT	Acted unfairly
HITBELOWTHEBELT	Fight dirty
HITBELOWTHEBELT	Fight dirty, in a way
HITBELOWTHEBELT	The unscrupulous candidate ...

HITBELOWTHEBELT	Engaged in foul play

Crossword

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