Feel nostalgic about
I believe the answer is:
miss
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">feel nostalgic about</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 miss that I've seen before include "Fail to find" , "Fail to hit; girl" , "Fail to notice; avoid" , "Fail; long for" , "Austria/Italy region" .)