Answer: atit

AnswerCrossword Clue
ATIT"Have ...!" ("Go ahead!")
ATIT"While you're ..,..."
ATIT"While you're ....."
ATITPersevering
ATIT"While you're .. ... "
ATITToiling or bickering
ATITOn the job
ATITHaving a tiff, say
ATITFighting
ATIT"I'll take a whack ..."
ATIT"Keep ...!"
ATITIn the act
ATIT"They're ... again!"
ATITHard ...: slaving away
ATITPlugging away
ATIT"They're .. again!"
ATITArguing
ATITGoing ..: fighting
ATITUp to no good, perhaps
ATITBattling
ATITWarring
ATITWorks diligently
ATITBusy
ATITSquabbling
ATITToiling away
ATITWorking hard
ATITBickering
ATITBusily working
ATITReally busy
ATITWorking away
ATITWorking diligently
ATITWay to go?
ATITEngaged tooth and nail
ATIT"Look ... this way"
ATITGoing full tilt
ATITGoing full throttle
ATITHave .. (battle)
ATITWent .. (battled)
ATITGoing .. (fighting)
ATITKeep .. (don't stop)