On a high (6)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">on a high</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for elated that I've seen before include "Exultant" , "Full of high-spirited delight" , "Hyped up" , "Overjoyed, happy and excited" , "Jubilant, very pleased" .)