Optimistic feeling (4)
I believe the answer is:
hope
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">optimistic feeling</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hope that I've seen before include "Confident expectation" , "Companion to faith and charity" , "One who wrote about prisoner" , "writer" , "English novelist" .)