Dulcify (7)
I believe the answer is:
sweeten
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dulcify</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sweeten that I've seen before include "Make sugary or saccharine" , "Appease" , "Add, eg, sugar to" , "Seen wet (anag.)" , "Make saccharine or honeyed" .)