Expressed delight (7)
(Other definitions for grinned that I've seen before include "was amused" , "Smiled broadly" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">expressed delight</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 oohed that I've seen before include "Sounded thrilled" , "showed pleasure" .)