Toiled (8)
I believe the answer is:
laboured
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">toiled</span>' is the definition.<br/ ><span class="explanation-format__explanation">('labour' can be a synonym of 'toil')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for laboured that I've seen before include "Produced" , "not done without difficulty" , "Worked hard or with difficulty" , "Toiled" , "Worked; not fluent" .)