Fruit tree (8)
I believe the answer is:
mulberry
'fruit tree' is the definition.
(I know that mulberry is a type of fruit tree)
This is all the clue.
(Other definitions for mulberry that I've seen before include "Tree, its leaves fed to silkworms" , "dark purple" , "the centre of attention in nursery circles?" , "Tree associated with silkworms" , "Fruit - artificial harbour" .)