Answer:

labors

AnswerCrossword Clue
LABORSHerculean efforts
LABORSSlogs away
LABORSA dozen for Hercules
LABORSSweats
LABORSExerts oneself
LABORSFeats for Hercules
LABORSBreaks one's back
LABORSDoings of Hercules
LABORSChallenges for Hercules
LABORSHercules had 12
LABORSDwells on
LABORSPlugs away (at)
LABORSHercules feats