Fruit with a stone (4)
I believe the answer is:
plum
'fruit with a stone' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for plum that I've seen before include "Dark-red fruit" , "Fruit tree - of especial value?" , "murderer" , "excellent?" , "Oval fruit with single hard stone" .)