Perspired (7)
I believe the answer is:
sweated
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">perspired</span>' is the definition.<br/ ><span class="explanation-format__explanation">('sweat' can be a synonym of 'perspire')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sweated that I've seen before include "(Of labour) ill treated and ill paid" , "Reacted to heat; exploited (labour)" .)