Happy and optimistic (6)
I believe the answer is:
cheery
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">happy and optimistic</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cheery that I've seen before include "Joyful -- optimistic" , "Merry, jovial" , "Happy, optimistic" , "In good spirits" , "Bright - pleasant - good-humoured" .)