Travail (4)
I believe the answer is:
toil
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">travail</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that travail can be written as toil)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for toil that I've seen before include "Work hard and long" , "Hard physical work" , "Work hard, labour" , "Work incessantly" , "Manual labour" .)