Make slightly wet (7)
I believe the answer is:
moisten
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">make slightly wet</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for moisten that I've seen before include "It's on me (anag)" , "contrary to sixteen down [DEHYDRATE]!" , "water a bit" , "What one's eyes may do!" , "Make damp or slightly wet" .)