Answer:

battler

Answer	Crossword Clue
BATTLER	One who doesn't quit
BATTLER	He won't quit
BATTLER	Fighter.

BATTLER	Dogged fighter.
BATTLER	Combatant.
BATTLER	Pugilist
BATTLER	Scrappy fellow
BATTLER	Fighting type
BATTLER	Combatant
BATTLER	One on the front line

Crossword

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