Fruit included in smelly cheese (6)
I believe the answer is:
lychee
'fruit' is the definition.
(lychee is a kind of fruit)
'included in smelly cheese' is the wordplay.
'included in' indicates a hidden word.
'LYCHEE' is hidden within 'smelly cheese'.
(Other definitions for lychee that I've seen before include "Popular Chinese fruit" , "Fruit originally from China" , "Oriental fruit" , "Rough-skinned fruit" , "Litchi" .)