Start of a seasonal greeting (5)
I believe the answer is:
happy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">start of a seasonal greeting</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for happy that I've seen before include "Fortunate - joyful" , "Joyous" , "Contented" , "Fortunate, convenient" , "Pleased, content" .)