Not sweet (7)
I believe the answer is:
savoury
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not sweet</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for savoury that I've seen before include "Salty or spicy - not sweet" , "Appetising; not sweet" , "'Tasty, not sweet (7)'" , "Morally wholesome" , "Delicious" .)