Tranquillised (7)
I believe the answer is:
sedated
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tranquillised</span>' is the definition.<br/ ><span class="explanation-format__explanation">('sedate' can be a synonym of 'tranquillize')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sedated that I've seen before include "Calmed with drugs" , "Dead set (anag) - tranquillised" , "Under the influence of drugs" , "Given calming drugs" , "kept calm" .)