Perspires (6)
I believe the answer is:
sweats
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">perspires</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 sweats that I've seen before include "Clothes" , "Perspires" , "Casual dress" , "Works hard" , "old soldiers" .)