What a papaya grows on (4)

I believe the answer is:
tree
(Other definitions for tree that I've seen before include "Plant with a main trunk and branches" , "Large, woody perennial plant" , "Woody growth" , "plane, say?" , "Eg, laburnum" .)
I believe the answer is:
tree
(Other definitions for tree that I've seen before include "Plant with a main trunk and branches" , "Large, woody perennial plant" , "Woody growth" , "plane, say?" , "Eg, laburnum" .)