Jamaican hybrid fruit (4)
I believe the answer is:
ugli
'jamaican hybrid fruit' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ugli that I've seen before include "West Indian citrus fruit" , "Citrus fruit of the West Indies" , "Grapefruit/tangerine hybrid" , "(Repulsive-looking?) fruit" , "Tropical fruit" .)