Excessive excitement (5)
I believe the answer is:
mania
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">excessive excitement</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mania that I've seen before include "Insanity" , "Mental disorder that results in excessive or violent responses" , "Frenzy" , "Over-enthusiasm" , "Obsessional enthusiasm" .)