Pear-shaped tropical fruit (7)
I believe the answer is:
avocado
'pear-shaped tropical fruit' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for avocado that I've seen before include "Shade of green" , "Pulpy fruit" , "Light green; fruit" , "Fruity colour" , "A fruit; a dull green" .)