Naively optimistic (6-4)
I believe the answer is:
starry-eyed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">naively optimistic</span>' is the definition.<br/ ><span class="explanation-format__explanation">(starry-eyed can mean idealistic)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for starry-eyed that I've seen before include "Romantically optimistic" , "Naively enthusiastic" , "Out of touch with reality" , "Naively idealistic" , "Full of unsophisticated optimism" .)