Small stone fruit (6)
I believe the answer is:
cherry
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small stone fruit</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 cherry that I've seen before include ""Loveliest of trees, the ____ now" (Housman)" , "The colour of a red fruit" , "Tree with stoned fruit" , "Cerise" , "Morello-flavoured liqueur" .)