Fleeting moment (5)
(Other definitions for sec that I've seen before include "Moderately dry, champagne say" , "very short space of time" , "Religious group." , "Twinkling" , "Dry wine perhaps" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fleeting moment</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 trice that I've seen before include "Next to no time" , "Second" , "Very brief moment" , "Short time" , "Old use for three times" .)