Hysterical (8)
I believe the answer is:
neurotic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hysterical</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for neurotic that I've seen before include "Over-anxious" , "Subject to excessive anxiety and behaviour" , "Emotionally disturbed" , "obsessive character" , "I counter in being subject to abnormal anxieties" .)