Disease in fruit announced twice (8)
I believe the answer is:
beriberi
'disease in fruit' is the definition.
'beriberi' can be an answer for 'disease' (beriberi is a kind of disease). I'm not sure about the 'in fruit' bit.
'announced twice' is the wordplay.
'announced' becomes 'beri' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'twice' indicates the doubling of some letters.
'beri' doubled is 'BERIBERI'.
Can you help me to learn more?
(Other definitions for beriberi that I've seen before include "illness" , "possible cause of heart failure" , "Disease (lack of vit. B1)" , "Disease caused by lack of vitamin B" , "Inflammatory disease" .)