Tropical woe (7)
I believe the answer is:
malaria
'tropical woe' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for malaria that I've seen before include "Tropical disease" , "Fever-inducing disease" , "Mosquito-borne disease" , "Am a liar (anag) - fever" , "Disease from bites by infected mosquitos" .)