Smiling (5)
I believe the answer is:
riant
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">smiling</span>' is the definition.<br/ ><span class="explanation-format__explanation">(riant means happy or cheerful)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for riant that I've seen before include "patently amused" , "Laughing" , "merry" .)