Prank, romp (8)
I believe the answer is:
escapade
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">prank</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">romp</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for escapade that I've seen before include "Adventurous T [TREAT]" , "Wild adventure" , "A reckless or mischievous adventure" , "Risky adventure" , "Daring adventure" .)