Some disappearing fruit (4)
I believe the answer is:
pear
'fruit' is the definition.
(I know that pear is a type of fruit)
'some disappearing' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'PEAR' can be found hidden inside 'disappearing'.
(Other definitions for pear that I've seen before include "Source of cider" , "Variety of pome" , "Cone-shaped fruit" , "Cider-making fruit" , "Juicy fruit" .)