Frolic, romp (7)
I believe the answer is:
skylark
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">frolic</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that frolic can be written as skylark)</span><br/ ><br/ >'<span class="explanation-format__original">romp</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that romp can be written as skylark)</span><br/ ><br/ ></span>
(Other definitions for skylark that I've seen before include "subject of 11 [ODE]" , "very high singer" , "Passerine bird" , "Bird that sings aloft" , "flier" .)