Breath freshener (4)
I believe the answer is:
mint
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">breath freshener</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 mint that I've seen before include "sweet herb" , "Excellent" , "and 18 Down: Southern US cocktail" , "sweet to suck?" , "Money-making herb?" .)