Convivial (5)
I believe the answer is:
merry
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">convivial</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for merry that I've seen before include "Fjull of fun and gaiety" , "Jolly and gay" , "Old King Cole was a ..... old soul" , "Jolly and bright" , "Cheerful, lively" .)