Part of body buried in tropical forest (4)
I believe the answer is:
calf
'part of body' is the definition.
(I know this)
'buried in tropical forest' is the wordplay.
'buried in' says the answer is hidden in the clue.
'CALF' is hidden within 'tropical forest'.
(Other definitions for calf that I've seen before include "Small neat" , "Is it above the ankle" , "binding?" , "Bovine youngster" , "Young bovine animal" .)