Relieving treatment (7)
I believe the answer is:
therapy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">relieving treatment</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for therapy that I've seen before include "will do you good" , "Healing treatment" , "They rap (anag.)" , "Medical treatment" , "Treatment designed to cure illness or disability" .)