Carouse, roister (5)
I believe the answer is:
revel
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">carouse</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">roister</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for revel that I've seen before include "Make merry, whoop it up" , "Make merry; luxuriate (in)" , "Make merry, have a ball" , "party" , "Merrymaking" .)