Ecstatically happy (6)
I believe the answer is:
elated
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ecstatically happy</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for elated that I've seen before include "Filled with joy and pride" , "Very pleased, quite high" , "Delighted, ecstatic" , "Overjoyed, in high spirits" , "Gleeful" .)